A female wearing glasses has her head tilted back.
A male wearing glasses leans forward.
Male and a female are opposite sexes and describes different people. Leaning forward is the opposite of tilting back, a person cannot lean forward and be tilting their head back also.
exists e3 e1 e2 p1 x1 x2 x3 x4 x5.(Theme(e3,x4) & Actor(e3,x1) & v_have(e3) & exists s1.(Theme(s1,x5) & a_back(s1)) & Recipient(e2,p1) & Topic(e2,x5) & v_tilt(e2) & (x4 = x5) & n_head(x4) & of(x4,x1) & n_female(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_glass(x3) & (x1 = x2) & n_female(x1))
exists e1 e2 s1 x1 x2 x3.(a_forward(s1) & Manner(e2,s1) & Actor(e2,x1) & v_lean(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_glass(x3) & (x1 = x2) & n_male(x1))