A group of people are sitting together at a picnic table.
People sit at a picnic table.
A group of people are people. People who are sitting are people who sit.
exists e1 p1 x1 x2 x3 x4.(at(e1,x3) & n_table(x3) & of(x3,x4) & n_picnic(x4) & exists s1.(Theme(s1,x1) & a_together(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(at(e1,x2) & n_table(x2) & of(x2,x3) & n_picnic(x3) & Actor(e1,x1) & v_sit(e1) & n_people(x1))