A man plays a strange stringed instrument on a street corner.
A man is playing a eukele.
Not all stringed instruments are a eukele.
exists e1 s1 s2 x1 x2 x3 x4.(on(e1,x3) & n_corner(x3) & of(x3,x4) & n_street(x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2) & a_stringed(s2) & Theme(s2,x2) & a_strange(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_eukele(x2) & n_man(x1))