Complex sentence: Around 1897, Bosanquet often played a game called Twisti-Twosti, where a player had to bounce a tennis ball on a table so that it could not be caught by the opposing player.
Split into simpler sentences: Around 1897, Bosanquet often played a table-top game called Twisti-Twosti. In Twisti-Twosti, a player has to bounce a tennis ball on a table so that it cannot be caught by the opposing player.