Complex sentence: Marie was executed by beheading in Donauwörth in 1256, following the standard practice for women found guilty of adultery; however, proof of guilt of adultery on her part could never be validated.
Split into simpler sentences: Marie was executed by beheading in Donauwörth in 1256, following the standard practice for women found guilty of adultery. However, proof of guilt of adultery on her part could never be validated.