a woman opens a present while drinking beer
Gril is drinking beer
Sentences are reversed. There's no connection to beer and opening a present.
exists e1 s1 x1 x2 x3 x4.(n_while(x4) & a_present(s1) & Theme(s1,x4) & Time(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_open(e1) & n_beer(x2) & of(x2,x3) & n_drinking(x3) & n_woman(x1))
exists e1 x1 x2.(ne_org_gril(x1) & Theme(e1,x2) & Actor(e1,x1) & v_drink(e1) & n_beer(x2))