Complex sentence: However, the government sought clawback of the grant very shortly after it was paid as the charity had breached its terms and the private donor withdrew following the announcement of a police investigation into allegations of sexual abuse at the charity.
Split into simpler sentences: However, the government sought clawback of the grant very shortly after it was paid on the ground that the charity had breached its terms. Additionally, the private donor withdrew the pledge following the announcement of a police investigation into allegations of sexual abuse at the charity.