A man is teaching three girls how to play an instrument.
The man is at a school
Sentence 1 is missing man is at school
exists e1 p1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_teach(e1) & Topic(x2,p1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_play(e2) & n_instrument(x3)) & n_girl(x2) & card_eq_3(x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2.(at(x1,x2) & n_school(x2)))