Costumed man performs for curious onlookers in front of a castle.
Man in a costume, performing for a crowd.
Man in a costume is a rephrasing of costumed man, performing is a rephrasing of performs, and it is a crowd because their are onlookers (plural).
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & for(x1,x3) & in(x3,x4) & of(x4,x5) & n_castle(x5) & n_front(x4) & n_onlooker(x3) & a_curious(s1) & Theme(s1,x3) & n_perform(x1) & of(x1,x2) & n_man(x2) & Theme(e1,x1) & v_costume(e1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & for(e1,x4) & n_crowd(x4) & Actor(e1,x3) & v_perform(e1) & (x2 = x3) & n_costume(x2) & n_man(x1))