static int indexOfFirstVerbOrPastParticiple(L<S> tok, int i) {
  ret indexOfAny(tok, i, combinedCollection(knownVerbs(), mechSetCI("Past Participles")));
}

static int indexOfFirstVerbOrPastParticiple(L<S> tok) {
  ret indexOfFirstVerbOrPastParticiple(tok, 0);
}