Musicians play near a concrete wall.
Music can be heard by that wall.
Musicians playing does not imply being able to be heard.
exists s1 x1 x2 x3.(a_topic(x1) & near(x1,x3) & n_wall(x3) & a_concrete(s1) & Theme(s1,x3) & n_play(x1) & (x1 = x2) & ne_nam_musicians(x2))
exists e1 p1 x1 x2.(n_wall(x2) & ne_nam_music(x1) & exists e2.(Actor(e2,x2) & Theme(e2,x1) & v_hear(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_can(e1))