Complex sentence: In 41 BC, Mark Antony, one of the triumvirs who ruled Rome in the power vacuum following Caesar's death, sent his intimate friend Quintus Dellius to Egypt to summon Cleopatra to Tarsus to meet Antony and answer questions about her loyalty.
Split into simpler sentences: In 41 BC, Mark Antony, one of the triumvirs who ruled Rome in the power vacuum following Caesar's death, sent his intimate friend Quintus Dellius to Egypt. Dellius had to summon Cleopatra to Tarsus to meet Antony and answer questions about her loyalty.