A group of people are playing instruments while sitting at a table.
A group of people are jamming out together for fun.
Not all people playing instruments are jamming out together for fun.
exists e1 e2 x1 x2 x3 x4.(while(e1,e2) & at(e2,x4) & n_table(x4) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_instrument(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 s1 s2 x1 x2 x3.(a_together(s2) & Manner(e1,s2) & a_out(s1) & Manner(e1,s1) & for(e1,x3) & n_fun(x3) & Actor(e1,x1) & v_jam(e1) & of(x1,x2) & n_people(x2) & n_group(x1))