Caused by: org.hibernate.MappingException: Could not determine type for: pl.diagno.model.vo.City, for columns: [org.hibernate.mapping.Column(city)]

package pl.diagno.model.vo;
import java.util.Date;
import javax.persistence.*;

@Entity
public class Person {
    @Id
    @GeneratedValue(strategy=GenerationType.SEQUENCE)
   private long id;
   private String name;
   private String surname;
   private City city;

   public Person(){}
   
   public Person(String name, String surname, City city){   
      this.name=name;
      this.surname=surname;
      this.city=city;
   }
   
   @Column
   public long getId() {
      return id;
   }
   public void setId(long id) {
      this.id = id;
   }

   @Column
   public String getName() {
      return name;
   }
   public void setName(String name) {
      this.name = name;
   }

   @Column
   public String getSurname() {
      return surname;
   }
   public void setSurname(String surname) {
      this.surname = surname;
   }

   @Column
   @ManyToOne(cascade = CascadeType.ALL, targetEntity = City.class)
   @JoinColumn(name="city_id")
   public City getCity() {
      return city;
   }
   public void setCity(City city) {
      this.city = city;
   }
}

package pl.diagno.model.vo;
import javax.persistence.*;

@Entity
public class City {

    @Id
    @GeneratedValue(strategy=GenerationType.SEQUENCE)
   private long id;
   private String name;
   
   public City(){}
   
   public City(String name){
      this.name=name;
   }
   @Column
   public long getId() {
      return id;
   }
   public void setId(long id) {
      this.id = id;
   }
   
   @Column
   public String getName() {
      return name;
   }
   public void setName(String name) {
      this.name = name;
   }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

   <bean id="sessionFactory"
      class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
      <property name="dataSource" ref="dataSource" />
      
         <property name="annotatedClasses">
            <list>
               <value>pl.diagno.model.vo.City</value>
               <value>pl.diagno.model.vo.Person</value>
            </list>
         </property>

      <property name="hibernateProperties">
         <props>
            <prop key="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</prop>
            <prop key="hibernate.connection.url">jdbc:oracle:thin:@xxx-90ac33161e0:1521:XE</prop>
            <prop key="hibernate.connection.username">diagno</prop>
            <prop key="hibernate.connection.password">1234</prop>
            <prop key="hibernate.default_schema">diagno</prop>
            <prop key="hibernate.connection.pool_size">10</prop>
            <prop key="show_sql">true</prop>
            <prop key="dialect">org.hibernate.dialect.OracleDialect</prop>
            <prop key="hibernate.hbm2ddl.auto">create-drop</prop>
         </props>
      </property>
   </bean>

   <bean id="dataSource"
      class="org.springframework.jdbc.datasource.DriverManagerDataSource">
      <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
      <property name="url" value="jdbc:oracle:thin:@xxx-90ac33161e0:1521:XE" />
      <property name="username" value="diagno" />
      <property name="password" value="1234" />
   </bean>

</beans>

public static void main(String[] args) {
      ApplicationContext context = new ClassPathXmlApplicationContext(
            new String[] { "applicationContext.xml" });
}

@Entity
public class CodeDesignator {
  private String code;
  private String desc;

  @Id
  @Column(name="CD_CODE")
  public  String getCode() { return code; }

  @Column(name="CD_DESC")
  public String getDesc() { return desc; }
}

@Entity
@IdClass(Assignment.AssignmentPk.class) // not sure of syntax, typing from memory
public class Assignment {
  private String assignCode;
  private CodeDesignator codeDesignator;
  private String desc;

  @Id
  @Column(name="ASSIGN_CODE")
  public String getAssignCode() { return assignCode; }

  @Id
  @ManyToOne
  @JoinColumn(name="CD_CODE")
  public CodeDesignator getCodeDesignator() { return codeDesignator; }

  @Column(name="ASSIGN_DESC")
  public String getDesc() { return desc; }

  public static class AssignmentPk {
    ...
  }
}

  private String designatorCode;

  @Id
  @Column(name="CD_CODE")
  public String getDesignatorCode() { return designatorCode; }