Three youngsters playing on their cellphones at a dinner table.
Three young people are on their cellphones.
Young people is a synonym or rephrasing for youngsters
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & at(e1,x4) & n_table(x4) & of(x4,x5) & n_dinner(x5) & on(e1,x3) & n_cellphone(x3) & of(x3,x1) & n_thing(x1) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_youngster(x1) & card_eq_3(x1))
exists p1 s1 x1 x2.(on(x1,x2) & n_cellphone(x2) & of(x2,x1) & n_thing(x1) & n_people(x1) & a_young(s1) & Theme(s1,x1) & card_eq_3(x1))