A varied crowd mills about (or rough-houses) on a public street, with lots of bicycles on display.
A crowd holds up picket signs.
Mills about or rough houses does not imply the group holds up picket signs.
exists s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & with(x1,x5) & of(x5,x6) & on(x6,x7) & n_display(x7) & n_bicycle(x6) & n_lot(x5) & on(x1,x4) & n_street(x4) & a_public(s3) & Theme(s3,x4) & about(x1,x3) & n_rough-house(x3) & a_((s2) & Theme(s2,x3) & n_mill(x1) & of(x1,x2) & n_crowd(x2) & a_varied(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_sign(x2) & of(x2,x3) & n_picket(x3) & n_crowd(x1))