public partial class Country
{
    public Country()
    {
        this.Entities = new HashSet<Entity>();
    }

    public int country_id { get; set; }
    public string country_name { get; set; }

    public virtual ICollection<Entity> Entities { get; set; }
}

public partial class Sector
{
    public Sector()
    {
        this.Entities = new HashSet<Entity>();
    }

    public int sector_id { get; set; }
    public string sector_name { get; set; }

    public virtual ICollection<Entity> Entities { get; set; }
}

public partial class Entity
{
    public Entity()
    {
        this.Entities_to_Indexes = new HashSet<Entities_to_Indexes>();
        this.StreamParameters_to_Entities = new HashSet<StreamParameters_to_Entities>();
        this.Tweets_to_Entities = new HashSet<Tweets_to_Entities>();
    }

    public int entity_id { get; set; }
    public string entity_name { get; set; }
    public int sector_id { get; set; }
    public int country_id { get; set; }

    public virtual Country Country { get; set; }
    public virtual Sector Sector { get; set; }
    public virtual ICollection<Entities_to_Indexes> Entities_to_Indexes { get; set; }
    public virtual ICollection<StreamParameters_to_Entities> StreamParameters_to_Entities { get; set; }
    public virtual ICollection<Tweets_to_Entities> Tweets_to_Entities { get; set; }
}