Boy in a red hat and blue shirt is walking on a sidewalk.
Two girls singing.
Girls and boys are different. Singing and walking are two separate things.
exists e1 s1 s2 x1 x2 x3 x4 x5.(ne_nam_boy(x1) & on(e1,x5) & n_sidewalk(x5) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_shirt(x4) & a_blue(s2) & Theme(s2,x4) & n_hat(x3) & subset_of(x4,x2) & subset_of(x3,x2) & a_red(s1) & Theme(s1,x2))
exists e1 x1.(Actor(e1,x1) & v_sing(e1) & n_girl(x1) & card_eq_2(x1))