Перевод SQL запроса в LINQ

public class Subdivisions
{
    public Subdivisions()
    {
        InverseIdSubordinateNavigation = new HashSet<Subdivisions>();
        PositionEmployees = new HashSet<PositionEmployees>();
    }
 
    public long Id { get; set; }
    public long? IdSubordinate { get; set; }
    public string DeptName { get; set; }
 
    public Subdivisions IdSubordinateNavigation { get; set; }
    public ICollection<Subdivisions> InverseIdSubordinateNavigation { get; set; }
    public ICollection<PositionEmployees> PositionEmployees { get; set; }
}
 
public class PositionEmployees
{
    public long Id { get; set; }
    public long IdEmployee { get; set; }
    public long IdSubdivision { get; set; }
 
    public Employee IdEmployeeNavigation { get; set; }
    public Position IdPositionNavigation { get; set; }
    public Subdivisions IdSubdivisionNavigation { get; set; }
}
 
public class Employee
{
    public long Id { get; set; }
    public string FirstName { get; set; }
    public string SecondName { get; set; }
    public string Patronymic { get; set; }
 
    public PositionEmployees PositionEmployees { get; set; }
}