A man is breakdancing in front of a crowd of people.
A man is standing still in front of a crowd of people.
If one is standing still, they are definitely not breakdancing.
exists e1 x1 x2 x3 x4.(in(e1,x2) & of(x2,x3) & of(x3,x4) & n_people(x4) & n_crowd(x3) & n_front(x2) & Actor(e1,x1) & v_breakdance(e1) & n_man(x1))
exists e1 s1 x1 x2 x3 x4.(in(e1,x2) & of(x2,x3) & of(x3,x4) & n_people(x4) & n_crowd(x3) & n_front(x2) & a_still(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & n_man(x1))