A man talks on his cellphone as he walks down the street.
A man is fishing in a boat.
one is either fishing or talking on a cellphone, not both. and a boat is not a street.
exists p1 x1 x2 x3 x4.(n_street(x4) & a_topic(x1) & exists e1.(down(e1,x4) & Actor(e1,x1) & v_walk(e1)) & n_male(x1) & n_male(x1) & as(x1,p1) & on(x1,x3) & n_cellphone(x3) & of(x3,x1) & n_talk(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2.(in(e1,x2) & n_boat(x2) & Actor(e1,x1) & v_fish(e1) & n_man(x1))