VGroup(_ finite Tense) -> V(_ finite:4 Tense) V(_ finite:4 _) "Sequence of two finite verbs":4 A weight of 4 is attached to the rule as a whole, but there are also weights attached to the 'finiteness' feature on the daughters: their function is to make it costly for the system to apply the rule to non-finite forms.
the feature specification 'finite' is made difficult to override to ensure that it is indeed a sequence of finite verbal forms the rule applies to and flags.