sentences:  Some known assistants who were registered in the Guarneri household and later became known luthiers include Giacomo Gennaro (1641-1646) and Paolo Grancino.The exact date of the beginning Giuseppe's apprenticeship is unknown, but evidence of his work begin to be recognizable in Guarneri instruments beginning in 1680, and his influence continued to increase towards the end of his father's career, surpassing that of his father by 1685.Instruments coming out of the Guarneri workshop also continue to show the inspiration of Andrea's eldest son, though he was living in Mantua.