The woman is holding a mug, and has sunglasses on the top of her head.
The woman is drinking coffee from her mug before heading to the beach.
Holding a mug is not the same at drinking coffee from a mug.  The fact that she has sunglasses on does not imply that she is heading to the beach.
exists e2 e1 x1 x2 x3 x4 x5.(n_head(x5) & of(x5,x4) & n_female(x4) & n_top(x4) & n_woman(x1) & on(e2,x4) & of(x4,x5) & Theme(e2,x3) & Actor(e2,x1) & v_have(e2) & n_sunglass(x3) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_mug(x2))
exists e2 e1 x1 x2 x3 x4.(n_beach(x4) & n_mug(x3) & of(x3,x1) & n_female(x1) & n_woman(x1) & before(e1,e2) & to(e2,x4) & Actor(e2,x1) & v_head(e2) & from(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_drink(e1) & n_coffee(x2))