module Db = struct
  type student = { sname : string; age : int; semester: int }

  let students = [
    { sname = "Student 1"; age = 19; semester = 1 };
    { sname = "Student 2"; age = 24; semester = 7 };
    { sname = "Student 3"; age = 28; semester = 12 };
    { sname = "Student 4"; age = 23; semester = 4 };
  ]
let find_student = (*to do*)
end