Original sentence: Rapprochement came about through what became known as Greek-Turkish earthquake diplomacy and today Greece is an active supporter of Turkey's effort to be accepted by the European Union as a full member, under the assumption that turkey addresses  humanitarian issues
Edited sentence: Rapprochement came about through what became known as Greek-Turkish earthquake diplomacy and today Greece is an active supporter of Turkey's effort to be accepted by the European Union as a full member, under the assumption that turkey addresses its numerous humanitarian issues