Complex sentence: The Asiatic Society of Bengal invited Tessitori to join its Linguistic Survey of India, and was tasked by Sir George Grierson to lead the Bardic and Historical Survey of Rajputana.
Split into simpler sentences: The Asiatic Society of Bengal invited Tessitori to join its Linguistic Survey of India. He was tasked by Sir George Grierson to lead the Bardic and Historical Survey of Rajputana.