A bearded, bespectacled man is singing.
A person with glasses is singing.
The person is singing because they are wearing glasses.
exists e1 s1 s2 s3 x1.(Actor(e1,x1) & v_sing(e1) & n_man(x1) & a_bespectacled(s3) & Theme(s3,x1) & a_,(s2) & Theme(s2,x1) & a_bearded(s1) & Theme(s1,x1))
exists e1 x1 x2.(Actor(e1,x1) & v_sing(e1) & with(x1,x2) & n_glass(x2) & n_person(x1))