 Complete the following phrase:  Matra kept Frenchman Jean-Pierre Beltoise, and New Zealander Chris Amon joined Matra using the Matra MS120B specification version for 1971. Beltoise was in difficulty following the 1971 1000 km Buenos Aires; racing for the Matra sports car team; he was involved in the accident in which Ignazio Giunti died, and Beltoises international racing licence was suspended for some time. Amon won the Non-Championship Argentine Grand Prix and finished fifth in the first round in the 1971 season in the 