A group of people are sitting at a table eating.
Some people are eating at a table.
A group of people are some people.
exists e1 x1 x2 x3 x4.(at(e1,x3) & n_eating(x3) & of(x3,x4) & n_table(x4) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2.(at(e1,x2) & n_table(x2) & Actor(e1,x1) & v_eat(e1) & n_people(x1))