A man lifting a large weight and screaming.
A man screams while injuring his back during a weightlifint competition.
Just because he is screaming, doesn't mean he hurt his back. And even though he is lifting weights, it isn't necessarily a competition.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_lift(e1) & subset_of(x5,x3) & n_screaming(x5) & subset_of(x4,x3) & n_weight(x4) & a_large(s1) & Theme(s1,x4) & (x1 = x2) & n_man(x1))
exists e2 e1 s1 x1 x2 x3.(while(e1,e2) & during(e2,x3) & n_competition(x3) & a_weightlifint(s1) & Theme(s1,x3) & Theme(e2,x2) & Actor(e2,x1) & v_injure(e2) & n_back(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_scream(e1) & n_man(x1))