Fails parsing 28MB+ files

[Kis Gabot]

Save these files locally (from browser)
https://www.sec.gov/Archives/edgar/data/0001308606/000119312520047353/d838367d10k_htm.xml
https://www.sec.gov/Archives/edgar/data/0001538990/000155837020001148/stor-20191231x10k_htm.xml

try to parse them:

import lxml.html
from lxml import etree as ET
tree = ET.parse('d838367d10k_htm.xml')

Gives:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "src\lxml\etree.pyx", line 3521, in lxml.etree.parse
  File "src\lxml\parser.pxi", line 1859, in lxml.etree._parseDocument
  File "src\lxml\parser.pxi", line 1885, in lxml.etree._parseDocumentFromURL
  File "src\lxml\parser.pxi", line 1789, in lxml.etree._parseDocFromFile
  File "src\lxml\parser.pxi", line 1177, in lxml.etree._BaseParser._parseDocFromFile
  File "src\lxml\parser.pxi", line 615, in lxml.etree._ParserContext._handleParseResultDoc
  File "src\lxml\parser.pxi", line 725, in lxml.etree._handleParseResult
  File "src\lxml\parser.pxi", line 654, in lxml.etree._raiseParseError
  File "file:/C:/tmp/d838367d10k_htm.xml", line 135192
lxml.etree.XMLSyntaxError: xmlSAX2Characters: huge text node, line 135192, column 362

and
  File "file:/C:/tmp/stor-20191231x10k_htm.xml", line 36534
lxml.etree.XMLSyntaxError: xmlSAX2Characters: huge text node, line 36534, column 11465481

Works without problem with built in stdlib etree. (we could fall back to that if there is no other solution)
Got 8GB RAM.

Python : sys.version_info(major=3, minor=6, micro=8, releaselevel='final', serial=0)
lxml.etree : (4, 6, 3, 0)
libxml used : (2, 9, 5)
libxml compiled : (2, 9, 5)
libxslt used : (1, 1, 30)
libxslt compiled : (1, 1, 30)

[scoder (scoder)]

See the "huge_tree" option.
https://lxml.de/parsing.html#parser-options