Complex sentence: When Ginsberg visited London in June 1965 and read at Better Books in Charing Cross Road, the event was so popular, shop manager Barry Miles suggested a larger event, incorporating fellow beat writers Lawrence Ferlinghetti and Gregory Corso who were due in the city.
Split into simpler sentences: When Ginsberg visited London in June 1965 he gave a reading at Better Books in Charing Cross Road which was extremely popular. The shop's manager Barry Miles suggested a larger event, incorporating fellow beat writers Lawrence Ferlinghetti and Gregory Corso who were due in the city.