Complex sentence: As different varieties of Shelta display different degrees of anglicisation (see below), it is hard to determine the extent of the Irish substratum but the Oxford Companion to the English Language puts it at 2,000--3,000 words.
Split into simpler sentences: As different varieties of Shelta display different degrees of anglicisation (see below), it is hard to determine the extent of the Irish substratum. The "Oxford Companion to the English Language" puts it at 2,000--3,000 words.