A crowd of people watching a snowboarder do tricks.
A man is skiing down a slope.
The man cannot be skiing or doing tricks on his snowboard at the same time. The second sentence says nothing about a crowd watching the man ski. Is he alone or in front of a crowd?
exists e2 e1 x1 x2 x3 x4 x5.(Theme(e2,x5) & Actor(e2,x1) & v_do(e2) & n_trick(x5) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_watch(e1) & n_snowboarder(x4) & (x2 = x3) & n_people(x2) & n_crowd(x1))
exists e1 s1 x1 x2.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_ski(e1) & n_slope(x2) & n_man(x1))