A man catches a ball in front of a large crowd.
A man is playing in front of other people.
A man, who catches is playing  in front of people.
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_catch(e1) & in(x2,x3) & of(x3,x4) & n_crowd(x4) & a_large(s1) & Theme(s1,x4) & n_front(x3) & n_ball(x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(n_people(x4) & in(e1,x2) & of(x2,x3) & -(x3 = x4) & n_people(x3) & n_front(x2) & Actor(e1,x1) & v_play(e1) & n_man(x1))