Protesters with political signs gather around a musical event.
While a musical even is happening protesters with political signs are gathering.
Gathering is a paraphrase of gather around.
exists e1 s1 s2 x1 x2 x3.(around(e1,x3) & n_event(x3) & a_musical(s2) & Theme(s2,x3) & Actor(e1,x1) & v_gather(e1) & with(x1,x2) & n_sign(x2) & a_political(s1) & Theme(s1,x2) & n_protester(x1))
exists p1 p2 p3.(exists e2 s2 x2 x3.(Actor(e2,x2) & v_gather(e2) & with(x2,x3) & n_sign(x3) & a_political(s2) & Theme(s2,x3) & n_protester(x2)) & exists e1 s1 x1.(a_even(s1) & Manner(e1,s1) & Actor(e1,x1) & v_happen(e1) & n_musical(x1)) & while(p2,p3))