Complex sentence: Ann Fisher (Slack) (bap 9 December 1719--2 May 1798) was an author and grammarian, is A New Grammar is considered the earliest published female author on English grammar.
Split into simpler sentences: Ann Fisher (Slack) (bap 9 December 1719--2 May 1798) was an author and grammarian. Her A New Grammar is considered the earliest published female author on English grammar.