A group of tourist walking down the street.
man are climbing the mountain.
street and mountain are different things
exists e1 x1 x2 x3 x4.(n_street(x4) & a_topic(x1) & down(e1,x4) & Actor(e1,x3) & v_walk(e1) & (x1 = x3) & of(x1,x2) & n_tourist(x2) & n_group(x1))
exists e1 x1 x2.(n_mountain(x2) & Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_man(x1))