A boy riding a Thomas the Tank Engine scooter and a girl riding a pink scooter are on the sidewalk.
two siblings play together
It is not implied that the girl and the boy are siblings.
exists e1 p1 x1 x2 x3 x10.(n_sidewalk(x10) & a_topic(x1) & exists e2 p2 s1 x4 x5 x6 x7 x8 x9.(on(x4,x10) & subset_of(x8,x4) & Theme(e2,x5) & Actor(e2,x9) & v_ride(e2) & n_scooter(x5) & n_scooter(x5) & a_pink(s1) & Theme(s1,x5) & (x8 = x9) & n_girl(x8) & subset_of(x5,x4) & (x5 = x7) & ne_org_engine(x7) & (x5 = x6) & ne_org_tank(x6)) & that(x1,p1) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & ne_per_thomas(x3) & (x1 = x2) & n_boy(x1))
exists e1 s1 x1.(a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_play(e1) & n_sibling(x1) & card_eq_2(x1))