A man in a darkened room performing skateboard tricks.
A man practices tricks on his bike.
One sentence says the man is riding a skateboard, the other a bike.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_perform(e1) & n_trick(x4) & of(x4,x5) & n_skateboard(x5) & (x2 = x3) & n_room(x2) & a_darkened(s1) & Theme(s1,x2) & n_man(x1))
exists x1 x2 x3 x4.(a_topic(x1) & on(x1,x4) & n_bike(x4) & of(x4,x1) & n_male(x1) & Time(x1,x3) & n_trick(x3) & n_practice(x1) & of(x1,x2) & n_man(x2))