Two small children sitting and jumping on a trampoline.
Two small children are classmates.
Just because children are on a trampoline does not necessarily mean they are classmates.
exists e1 e2 s1 s2 x1 x2 x3.(on(e2,x3) & n_trampoline(x3) & Actor(e2,x2) & v_jump(e2) & n_child(x2) & a_small(s2) & Theme(s2,x2) & card_eq_2(x2) & Actor(e1,x1) & v_sit(e1) & n_child(x1) & a_small(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 s1 x1.(exists x2.((x1 = x2) & n_classmate(x2)) & n_child(x1) & a_small(s1) & Theme(s1,x1) & card_eq_2(x1))