a bicyclist wearing a helmet jumping a trick on his back tire
a byciclist doing tricks
Jumping a trick on a back tire requires doing tricks. So a bicyclist must be doing tricks for this to happen.
exists e2 e1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & on(e1,x6) & n_tire(x6) & of(x6,x7) & n_back(x7) & of(x6,x1) & n_male(x1) & Theme(e1,x5) & Actor(e1,x4) & v_jump(e1) & n_trick(x5) & (x3 = x4) & n_helmet(x3) & (x1 = x2) & n_bicyclist(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_trick(x3) & (x1 = x2) & n_byciclist(x1))