An old guitar player without a shirt on is pointing, sweating.
a young guitar player is sweating
An old person and young person belong to different age groups.
exists e1 s1 s2 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_point(e1) & n_sweat(x3) & a_,(s2) & Theme(s2,x3) & -exists s3 x4 x5.(with(x1,x4) & Theme(s3,x5) & a_on(s3) & (x4 = x5) & n_shirt(x4)) & n_player(x1) & of(x1,x2) & n_guitar(x2) & a_old(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Actor(e1,x1) & v_sweat(e1) & n_player(x1) & of(x1,x2) & n_guitar(x2) & a_young(s1) & Theme(s1,x1))