Implement "etc." as NOUN

[nschneid]

UniversalDependencies/docs#820

[amir-zeldes]

I'll add this to the GUM buildbot as well

[nschneid]

Since we're going with NOUN I'm assuming NN and Number=Sing

[nschneid]

and might as well add Abbr=Yes though we haven't done that yet for other standard abbreviations in EWT

[amir-zeldes]

Since we're going with NOUN I'm assuming NN and Number=Sing

No, I would not assume that we can just change an established PTB xpos guideline (otherwise we will create a divergence where in UD xpos it's NN and in LDC xpos datasets it's FW). I'd just leave it as xpos=FW, that's not a UD thing anyway.

[nschneid]

Hmm OK, I guess I'm confused why we decided not to treat it as foreign in UD if that was a well-established Penn guideline. But I can change it back.