http://groups.google.com/group/alt.usage.english/msg/c93ec4c90d9128a5
(by John L. ... )----------------
They're all grammatical, though they mean different things, and as usual deletions come at a price in ambiguity.
The general rule is that Whiz Deletion (the name of the rule
that deletes the "Wh- Is" part of a restrictive relative clause....
participle clause
participial phrase
-----------------
"... , including ..." vs "... , which included ...."
http://groups.google.com/group/alt.usage.english/msg/a580ad71b250f732
-------------------
negative polarity items
someone vs anyone
http://groups.google.com/group/alt.usage.english/msg/0f876f2a5f0c0c49
