A laughing baby in a walker.
An adult grimacing in pain.
Baby refers to young, adult refers to old. Laughing is positive while grimacing is negative.
exists e1 x1 x2.(a_topic(x1) & in(x1,x2) & n_walker(x2) & n_baby(x1) & Actor(e1,x1) & v_laugh(e1))
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_pain(x3) & Actor(e1,x2) & v_grimace(e1) & (x1 = x2) & n_adult(x1))