An example for the code to be used in english, into theWebMind 3rd version

mind3rd-demo_en

teacher may have many students.
each student has many teachers.

both student and teacher have name:string and age:integer.
student has nickname:varchar(80, unique) and sex:char(1, required, "F", {F=Female|M=Male}).

all the students have father.
father has id:int(key) and greencard:int(key, "=1900");