Two people running on a treadmill inside.
Two people are talking about politics while on treadmills.
Two people could be talking about something other than politics while running on the treadmills.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_inside(x3) & of(x3,x4) & n_treadmill(x4) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(on(e1,x3) & n_treadmill(x3) & r_while(e1) & about(e1,x2) & n_politics(x2) & Actor(e1,x1) & v_talk(e1) & n_people(x1) & card_eq_2(x1))