A person in black riding a three wheeled bike.
A girl in a black dress is pedaling a tricycle.
A person is not necessarily be a girl. Riding doesn't necessarily imply pedaling.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_bike(x4) & a_wheeled(s1) & Theme(s1,x4) & card_eq_3(x4) & (x1 = x3) & in(x1,x2) & n_black(x2) & n_person(x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_pedal(e1) & n_tricycle(x3) & in(x1,x2) & n_dress(x2) & a_black(s1) & Theme(s1,x2) & n_girl(x1))