Complex sentence: D-ALES became the first prototype of the He 111 A- 1 on 10 January 1936, and received recognition as the "fastest passenger aircraft in the world", as its speed exceeded 402 km/h (250 mph).
Split into simpler sentences: D-ALES became the first prototype of the He 111 A- 1. On 10 January 1936, and received recognition as the "fastest passenger aircraft in the world", as its speed exceeded 402 km/h (250 mph).