2 | 7. as:(Label Term) List.
1of(unzip(as)) = rel_primed_vars(r)
& ( i: . i < ||as||  2of(as[i]) smts_eff(action_effect(a;A.eff;A.frame);1of(as[i]))) r':rel(), as:(Label Term) List.
1of(unzip(as)) = rel_primed_vars(r)
& ( i: . i < ||as||  2of(as[i]) ( x.smts_eff(action_effect(a;A.eff;A.frame);x))(1of(as[i])))
& r' = rel_subst2(as;r) |