CoNLL-U Entity annotations can now be read and accessed in the API like this:
from depedit import DepEdit
d = DepEdit()
conllu = open("GUM_academic_art.conllu").read()
d.run_depedit(conllu, parse_entities=True)
print(d.entities) # Unique entities by cluster
print(d.mentions) # All mentions of all entities
print(d.mentions[0].head.pos) # Head POS tag of first mention
print(d.mentions[0].annos["etype"]) # Entity type of first mention