Two girls on tricycles are riding around a concrete area that resembles part of a maze.
The two girls are sisters
Just because the girls are riding their tricycles together it does not mean they are sisters.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(around(e1,x3) & Theme(e2,x5) & Actor(e2,x4) & v_resemble(e2) & of(x5,x6) & n_maze(x6) & n_part(x5) & (x3 = x4) & n_area(x3) & a_concrete(s1) & Theme(s1,x3) & Actor(e1,x1) & v_ride(e1) & on(x1,x2) & n_tricycle(x2) & n_girl(x1) & card_eq_2(x1))
exists p1 x1.(n_girl(x1) & card_eq_2(x1) & exists x2.((x1 = x2) & n_sister(x2)))