A group of people are wearing signs that say on strike while someone is speaking at a booth with the Presidential seal.
The group of people are wearing flags
The subjects cannot be wearing signs and flags unless so described in the same sentence.
exists e1 e2 p1 s1 x1 x2 x3 x4 x5 x8.(n_seal(x8) & a_presidential(s1) & Theme(s1,x8) & Theme(e2,x3) & Actor(e2,x1) & v_wear(e2) & exists e3 x6 x7.(at(e3,x7) & with(x7,x8) & n_booth(x7) & Actor(e3,x6) & v_speak(e3) & n_person(x6)) & while(e1,p1) & on(e1,x5) & n_strike(x5) & Actor(e1,x4) & v_say(e1) & (x3 = x4) & n_sign(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(n_group(x1) & Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_flag(x3) & of(x1,x2) & n_people(x2))