Two skateboarders walking down a sidewalk in front of many parking signs.
Two male friends are carrying their skateboards while walking by some signs
Not all skateboarders are male, two people can be together and not be friends.
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(e1,x4) & of(x4,x5) & n_sign(x5) & of(x5,x6) & n_parking(x6) & n_quantity(x5) & n_front(x4) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_walk(e1) & n_sidewalk(x3) & (x1 = x2) & n_skateboarder(x1) & card_eq_2(x1))
exists e1 e2 s1 x1 x2 x3.(while(e1,e2) & by(e2,x3) & n_sign(x3) & Actor(e2,x1) & v_walk(e2) & Theme(e1,x2) & Actor(e1,x1) & v_carry(e1) & n_skateboard(x2) & of(x2,x1) & n_thing(x1) & n_friend(x1) & a_male(s1) & Theme(s1,x1) & card_eq_2(x1))