A man sits in a chair by the pool, playing the guitar.
A girl plays the banjo on stage.
A guitar and a banjo are different string instruments. Playing on stage is different than playing while seated by a pool.
exists e1 e2 x1 x2 x3 x4.(n_guitar(x4) & n_pool(x3) & for(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_play(e2) & by(e1,x3) & in(e1,x2) & n_chair(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2 x3.(n_banjo(x2) & on(e1,x3) & n_stage(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_girl(x1))