A child in red, wearing rollerskates is being pushed along by an adult in black.
The child is roller skating
The child is wearing rollerskates, but is being pushed along by an adult so may not be actually roller skating.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(rel(e2,x5) & in(x5,x6) & n_red(x6) & n_child(x5) & Actor(e2,x3) & in(x3,x4) & n_black(x4) & n_adult(x3) & a_along(s1) & Manner(e2,s1) & Theme(e2,e1) & v_push(e2) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_rollerskate(x2) & n_thing(x1))
exists p1 x1.(n_child(x1) & exists e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_skate(e1) & (x2 = x3) & n_roller(x2)))