Complex sentence: Moses of Évreux was a French tosafist, and author of a siddur, "Semaḳ" No.154 who flourished at Évreux in Normandy in the first half of the thirteenth century, and was the older brother and teacher of the tosafist Samuel of Évreux.
Split into simpler sentences: Moses of Évreux was a French tosafist, and author of a siddur, "Semaḳ" No.154 who flourished at Évreux in Normandy in the first half of the thirteenth century. Moses was the older brother and teacher of the tosafist Samuel of Évreux.