Two adults at a table eating chips pickles and hamburgers.
Two adults are on a picnic.
If two people are eating together this does not mean they are on a picnic.
exists x1 x2 x3 x4 x5 x6 x7 x8 x9.(a_topic(x1) & at(x1,x6) & Time(x6,x9) & n_hamburger(x9) & n_chip(x6) & of(x6,x8) & n_eating(x8) & of(x6,x7) & n_table(x7) & at(x1,x2) & Time(x2,x5) & n_pickle(x5) & n_chip(x2) & of(x2,x4) & n_eating(x4) & of(x2,x3) & n_table(x3) & n_adult(x1) & card_eq_2(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_picnic(x2)) & n_adult(x1) & card_eq_2(x1))