(\beither_[A-Z]+ \w+_[^V]+ )(are)_
Regexp with Flags:
/(\beither_[A-Z]+ \w+_[^V]+ )(are)_/i
Check for "either" followed by words with POS tags that do not start with a "V" hence are non verbs.
"Either" should be used only to refer to one of two items. "Any" is required when more than two items are involved,