A group of people gather and holding different types of flags.
A group of people running in a marathon.
Each sentence is withholding information about the marathon; holding flags and running in a marathon.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7 x8.(n_type(x7) & a_topic(x1) & of(x1,x4) & Theme(e2,x6) & Actor(e2,x5) & v_hold(e2) & of(x6,x8) & n_flag(x8) & -(x6 = x7) & n_type(x6) & (x4 = x5) & n_people(x4) & of(x1,x2) & Actor(e1,x3) & v_gather(e1) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & in(e1,x4) & n_marathon(x4) & Actor(e1,x3) & v_run(e1) & (x2 = x3) & n_people(x2) & n_group(x1))