Five people of different ages are sitting at the table playing a board game.
Five people from grammar school age to high school age are sitting at the table playing Monopoly.
People of any ages, not just grammar school age to high school age, can play board games. There is nothing to suggest the board game is Monopoly.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(n_table(x4) & n_age(x3) & at(e1,x4) & Theme(e2,x6) & Actor(e2,x5) & v_play(e2) & n_game(x6) & of(x6,x7) & n_board(x7) & (x4 = x5) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & -(x2 = x3) & n_age(x2) & n_people(x1) & card_eq_5(x1))
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(n_table(x7) & at(e1,x7) & a_monopoly(s2) & Manner(e2,s2) & Actor(e2,x8) & v_play(e2) & (x7 = x8) & Actor(e1,x1) & v_sit(e1) & to(x1,x5) & n_age(x5) & of(x5,x6) & n_school(x6) & a_high(s1) & Theme(s1,x5) & from(x1,x2) & n_age(x2) & of(x2,x4) & n_school(x4) & of(x2,x3) & n_grammar(x3) & n_people(x1) & card_eq_5(x1))