Two boys riding tricycles on concrete wearing short-sleeve shirts.
Two boys are riding on their tricycles.
"Two boys are riding on their tricycles" is a rephrasing of "Two boys riding tricycles."
exists e2 e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & on(e1,x4) & Theme(e2,x6) & Actor(e2,x5) & v_wear(e2) & n_shirt(x6) & a_short-sleeve(s1) & Theme(s1,x6) & (x4 = x5) & n_concrete(x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_tricycle(x3) & (x1 = x2) & n_boy(x1) & card_eq_2(x1))
exists e1 x1 x2.(on(e1,x2) & n_tricycle(x2) & of(x2,x1) & n_thing(x1) & Actor(e1,x1) & v_ride(e1) & n_boy(x1) & card_eq_2(x1))