A woman is waterskiing while being photographed by some men.
A group of people are sitting enjoying tea.
A woman is one and group is more than one and it is not possible to be waterskiing and sitting at the same time.
exists e2 e1 x1 x2.(while(e1,e2) & Actor(e2,x2) & n_man(x2) & Theme(e2,x1) & v_photograph(e2) & Actor(e1,x1) & v_waterskie(e1) & n_woman(x1))
exists e2 e1 x1 x2 x3.(for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_enjoy(e2) & n_tea(x3) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_people(x2) & n_group(x1))