A small boy picks up a rock from a river
A lady in black is visiting her friends.
small boy is not a lady  picks up and visiting are two different conditions
exists e1 s1 s2 x1 x2 x3.(from(e1,x3) & n_river(x3) & a_up(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_pick(e1) & n_rock(x2) & n_boy(x1) & a_small(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_visit(e1) & n_friend(x3) & of(x3,x1) & n_female(x1) & in(x1,x2) & n_black(x2) & n_lady(x1))