An old man with glasses hugs a young woman at a gathering of quite a few people.
A man without glasses hugs his mom.
A man either has glasses or has no glasses. If he is an old man hugging a young woman, his mom can not be a young woman.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5.(Theme(e1,x3) & Actor(e1,x1) & v_hug(e1) & at(x3,x4) & of(x4,x5) & r_quite(x5) & n_people(x5) & a_few(s3) & Theme(s3,x5) & n_gathering(x4) & n_woman(x3) & a_young(s2) & Theme(s2,x3) & with(x1,x2) & n_glass(x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hug(e1) & n_mom(x2) & of(x2,x1) & n_male(x1) & -exists x3.(with(x1,x3) & n_glass(x3)) & n_man(x1))