Complex sentence: When the Philadelphia Phillies played at the Baker Bowl during the 1920s, an outfield wall advertisement for Lifebuoy stated, "All the Phillies use Lifebuoy", and a graffiti artist sneaked in one night and added to the ad, "And they still stink".
Split into simpler sentences: When the Philadelphia Phillies played at the Baker Bowl during the 1920s, an outfield wall advertisement for Lifebuoy stated, "All the Phillies use Lifebuoy". One night a graffiti artist sneaked in and added to the ad, "And they still stink".