Complex sentence: He lived with his girlfriend and their daughter in Harderwijk, where they had moved in 2001, but was said to have appeared over-stressed since the birth of their child on December 6,2001.
Split into simpler sentences: He lived with his girlfriend and their daughter in Harderwijk, where they had moved in 2001. Some observers described him as stressed since the birth of their child on December 6,2001.