Examples of word types for each Number value :

The word types shown below are ordered by token frequency in the treebank.

Lemma	Morphosyntactic Attributes	Number
Lemma	Morphosyntactic Attributes	NA
that		that
when		when
if		if
as		as
because		because
while		while
whether		whether
though		though
although		although
whereas		whereas
until		until
where		where
since		since
from		from
to		to
once		once
so		so
unless		unless
why		why
with		with
for		for
then		then
wherever		wherever
after		after
before		before
on		on
however		however
whereby		whereby
whenever		whenever
albeit		albeit