The 4 guys were rollerskating and blading a conga line in the outdoor staking rink with many other people on the sunny day.
The 4 guys were skating by themselves, each doing their own things.
The men can either be by themselves or with many other people, but not both.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(n_day(x8) & a_sunny(s2) & Theme(s2,x8) & n_people(x7) & n_rink(x4) & of(x4,x5) & n_staking(x5) & a_outdoor(s1) & Theme(s1,x4) & n_guy(x1) & n_date(x1) & a_date_day_04(x1) & a_date_day_04(x1) & on(e2,x8) & Theme(e2,x2) & Actor(e2,x1) & v_blade(e2) & with(x2,x6) & -(x6 = x7) & n_people(x6) & n_quantity(x6) & in(x2,x4) & n_line(x2) & of(x2,x3) & n_conga(x3) & Actor(e1,x1) & v_rollerskate(e1))
exists e1 x1 x2.(n_thing(x2) & n_group(x2) & n_guy(x1) & n_date(x1) & a_date_day_04(x1) & a_date_day_04(x1) & by(e1,x2) & all s1 x3.((n_thing(x3) & a_own(s1) & Theme(s1,x3) & of(x3,x2) & n_thing(x3)) -> exists e2 x4.(rel(x2,x3) & Theme(e2,x3) & Actor(e2,x4) & v_do(e2) & (x3 = x4))) & Actor(e1,x1) & v_skate(e1))