Complex sentence: In modern times, of which written history is available in terms of stone inscriptions and other sources, the first Rajput kingdoms are attested to in the 6th century and these Rajputs rose to prominence in the 5th and 6th centuries after the collapse of Gupta empire.
Split into simpler sentences: In modern times, of which written history is available as stone inscriptions and other sources, the first Rajput kingdoms are attested to in the 6th century. The Rajputs rose to prominence in the 5th and 6th centuries after the collapse of the Gupta empire.