A man wearing a red helmet jumps up while riding a skateboard.
The man performed a trick for the crowd.
Man jumps up while riding a skateboard does not imply that he performed a trick for the crowd.
exists e2 e1 e3 s1 s2 x1 x2 x3 x4.(while(e2,e3) & Theme(e3,x4) & Actor(e3,x1) & v_ride(e3) & n_skateboard(x4) & a_up(s2) & Manner(e2,s2) & Actor(e2,x1) & v_jump(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_helmet(x3) & a_red(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(n_crowd(x3) & n_man(x1) & for(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_trick(x2))