text: Title: Dependency parsing: is there some way to discourage multiple `nsubj` dependents?
  Body: A very weird English tree produced by Stanza 1.6.0 in the [demo](http://stanza.run/):
  
  > My cousin my extremely rude colleague admired last year chewed the chicken enthusiastically.
  
  <img width="1171" alt="image" src="https://github.com/stanfordnlp/stanza/assets/985263/a6468f67-9d09-4ad5-8f3e-4cbc92d08e6b">
  
  In UD, no word is allowed to have multiple (plain) `nsubj` dependents. But "admired" has two.
  
  Is there a recommended alternate training or decoding method in Stanza that could avoid this sort of problem?