premise: Several people have gathered behind a group of other people who are sitting around a table.
hypothesis: There are several people sitting around a table.
explanation_1: If people are gathering behind other people who are sitting around a table, it follows that there have to be several people sitting around a table already.
explanation_2: A group is composed of several people.
explanation_3: Several people and a group of people mean the same thing.
premise_logic: exists e2 e1 s1 x1 x2 x3 x4 x5.(behind(e1,x2) & of(x2,x3) & around(e2,x5) & n_table(x5) & Actor(e2,x4) & v_sit(e2) & (x3 = x4) & -(x3 = x1) & n_people(x1) & n_people(x1) & n_people(x3) & n_group(x2) & Actor(e1,x1) & v_gather(e1) & a_several(s1) & Theme(s1,x1))
hypothesis_logic: exists p1 x1 e1 s1 x2 x3 x4.((x1 = x2) & around(e1,x4) & n_table(x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_people(x2) & a_several(s1) & Theme(s1,x2))
premise_sim: exists e2 e1 s1 x1 x2 x3 x4 x5.(v_sit(e2) & v_gather(e1) & of(x2,x3) & n_table(x5) & n_people(x3) & n_people(x1) & n_group(x2) & behind(e1,x2) & around(e2,x5) & a_several(s1) & Theme(s1,x1) & Actor(e2,x4) & Actor(e1,x1) & -(x3 = x1) & (x3 = x4))
hypothesis_sim: exists x1 e1 s1 x2 x3 x4.(v_sit(e1) & n_table(x4) & n_people(x2) & around(e1,x4) & a_several(s1) & Theme(s1,x2) & Actor(e1,x3) & (x2 = x3) & (x1 = x2))