Complex sentence: The Be- 10 is sometimes referred to as the M-10, though this designation is believed to apply only to the modified Be- 10 that established 12 FAI world records in 1961, coded'40 Yellow'.
Split into simpler sentences: The Be- 10 is sometimes referred to as the M-10. This designation is believed to apply only to the modified Be- 10 that established 12 FAI world records in 1961, coded'40 Yellow'.