Complex sentence: King Jan III Sobieski may also have rested under the oak on his way back from the Battle of Vienna and reputedly hid a Turkish sabre, an arquebus and a bottle of wine inside it to commemorate the victory.
Split into simpler sentences: King Jan III Sobieski may also have rested under the oak on his way back from the Battle of Vienna. He reputedly hid a Turkish sabre, an arquebus and a bottle of wine inside it to commemorate the victory.