A group of elders gathers outdoors.
A group of elders gather to play chess at the park.
Sentence 1 does not state what the reason for the elders to gather in outdoors so both the occupation, to play chess and the location of at the park cannot be inferred from sentence 1.
exists x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & n_outdoors(x2) & of(x2,x4) & n_gather(x4) & of(x2,x3) & n_elder(x3) & n_group(x1))
exists e1 p1 x1 x2 x4.(n_park(x4) & Topic(e1,p1) & Actor(e1,x1) & v_gather(e1) & exists e2 x3.(at(e2,x4) & Theme(e2,x3) & Actor(e2,x1) & v_play(e2) & n_chess(x3)) & of(x1,x2) & n_elder(x2) & n_group(x1))