Complex sentence: On 26 May 2016 Paul presented the first episode of the second series on "Paul Sinha's History Revision" on BBC Radio Four, in which he described how women have been airbrushed out of history.
Split into simpler sentences: On 26 May 2016 Paul presented the second series on "Paul Sinha's History Revision" on BBC Radio Four. In the first episode of the series, he described how women have been airbrushed out of history.