Cool guy decides to do a back flip in a park.
A guy is trying to hail a cab.
A guy can not be doing a back flip in a park and hailing a cab simultaneously.
exists e1 p1 x1 x2.(Topic(e1,p1) & Actor(e1,x1) & v_decide(e1) & exists e2 s1 x3 x4.(in(e2,x4) & n_park(x4) & Theme(e2,x3) & Actor(e2,x1) & v_do(e2) & n_flip(x3) & a_back(s1) & Theme(s1,x3)) & n_guy(x1) & (x1 = x2) & ne_nam_cool(x2))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_hail(e2) & n_cab(x2)) & n_guy(x1))