A runner in a purple outfit is racing in front of crowd.
A crowd watches someone race.
A runner racing in front of crowd will follow the act of the crowd of watching him race.
exists e1 s1 x1 x2 x3 x4.(in(e1,x3) & of(x3,x4) & n_crowd(x4) & n_front(x3) & Actor(e1,x1) & v_race(e1) & in(x1,x2) & n_outfit(x2) & a_purple(s1) & Theme(s1,x2) & n_runner(x1))
exists e1 x1 x2 x3.(Recipient(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_person(x3) & n_race(x2) & n_crowd(x1))