Complex sentence: Pan-European Phoneathon is a fundraising event held by the Hayastan All-Armenian Fund's French affiliate ("Fonds Armenien de France") and is the second largest fundraising event of the Hayastan Fund after its Telethon broadcast from Los Angeles.
Split into simpler sentences: Pan-European Phoneathon is a fundraising event held by the Hayastan All-Armenian Fund. It is the second largest fundraising event of the organization, after its Telethon held in Los Angeles.