Three boys are playing soccer.
Three boys are sitting in the classroom frustrated by math problems.
sitting and playing cannot be done at the same time.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_soccer(x2) & n_boy(x1) & card_eq_3(x1))
exists e1 e2 x1 x2 x3 x4 x5.(n_classroom(x2) & in(e1,x2) & Actor(e2,x4) & n_problem(x4) & of(x4,x5) & n_math(x5) & Theme(e2,x3) & v_frustrate(e2) & (x2 = x3) & Actor(e1,x1) & v_sit(e1) & n_boy(x1) & card_eq_3(x1))