A man is rock climbing.
A man climbs an indoor rock wall.
Just because a man is rock climbing doesn't mean he is using an indoor rock wall.
exists p1 x1.(exists x2 x3.((x1 = x2) & n_climb(x2) & of(x2,x3) & n_rock(x3)) & n_man(x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_wall(x2) & of(x2,x3) & n_rock(x3) & a_indoor(s1) & Theme(s1,x2) & n_man(x1))