Some people are sitting around a fire and drinking.
Some people go swimming.
Siting around a fire and drinking is a different activity than swimming.
exists e1 x1 x2 x3 x4.(around(e1,x2) & n_drinking(x4) & n_fire(x3) & subset_of(x4,x2) & subset_of(x3,x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_swimming(x2) & n_people(x1))