as if not treated as fixed

[AngledLuffa]

In the documentation, as if is treated as fixed: https://universaldependencies.org/en/dep/fixed.html#pragmaticmiscellaneous-markers

here though, it gets two mark mark relations

[AngledLuffa]

# sent_id = weblog-blogspot.com_dakbangla_20041119231111_ENG_20041119_231111-0013
# text = And the Tigers look as if they are on the brink of launching another offensive," Muni told IPS.
5       as      as      SCONJ   IN      _       11      mark    11:mark _
6       if      if      SCONJ   IN      _       11      mark    11:mark _
7       they    they    PRON    PRP     Case=Nom|Number=Plur|Person=3|PronType=Prs      11      nsubj   11:nsubj        _
8       are     be      AUX     VBP     Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin   11      cop     11:cop  _
...

and this is consistent throughout the treebank