Masked protester surrounded by the police.
Police prepare to arrest an anti-brutality protester.
Not all protesters are anti-brutality protesters.
exists e1 x1 x2 x3.(n_police(x3) & Actor(e1,x3) & Theme(e1,x1) & v_surround(e1) & n_protester(x1) & (x1 = x2) & ne_nam_masked(x2))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2 s1 x2.(Theme(e2,x2) & Actor(e2,x1) & v_arrest(e2) & n_protester(x2) & a_anti-brutality(s1) & Theme(s1,x2)) & n_police(x1))