Two people are playing guitar, while a third is flaying the drums.
Two people are touching the guitar.
Two people are touching the guitar implies two people are playing guitar
exists e1 p1 x1 x2 x4.(n_drum(x4) & exists e2 x3.(Theme(e2,x4) & Actor(e2,x3) & v_flay(e2) & n_third(x3)) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_guitar(x2) & Theme(e1,x2) & Actor(e1,x1) & v_touch(e1) & n_people(x1) & card_eq_2(x1))