A gentleman is walking along playing the bagpipes.
He is struming a guitar.
Bagpipes and a guitar are different instruments.
exists e2 e1 s1 x1 x2.(n_bagpipe(x2) & for(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & a_along(s1) & Manner(e1,s1) & Actor(e1,x1) & v_walk(e1) & n_gentleman(x1))
exists e1 x1 x2.(n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_strume(e1) & n_guitar(x2))