Several young people are standing around drinking beverages at some kind of outdoors gathering with food.
Young people are drinking underage.
Just because young people are standing around drinking beverages outdoors doesn't mean they are drinking underage. They may be drinking Coke.
exists e1 e3 e2 s1 s2 x1 x2 x3 x4 x5.(for(e2,e3) & with(e3,x5) & n_food(x5) & Actor(e3,x1) & v_gather(e3) & around(e1,e2) & at(e2,x3) & of(x3,x4) & n_outdoors(x4) & n_kind(x3) & Theme(e2,x2) & Actor(e2,x1) & v_drink(e2) & n_beverage(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1) & a_young(s2) & Theme(s2,x1) & a_several(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drink(e1) & n_underage(x2) & n_people(x1) & a_young(s1) & Theme(s1,x1))