Original: Around 850, out of obscurity rose Vijayalaya, made use of an opportunity arising out of a conflict between Pandyas and Pallavas, captured Thanjavur and eventually established the imperial line of the medieval Cholas.
Simplified: Around 850 rose Vijayalaya, made use of an opportunity arising out of a conflict between Pandyas and Pallavas, captured Thanjavur and eventually established the imperial line of the medieval Cholas.