travelling by bus in ukraine is comfortable for short distances but for longer rides it is really recommended to use the train.

How would the previous sentence be correctly capitalized?
Answer: Travelling by bus in Ukraine is comfortable for short distances but for longer rides it is really recommended to use the train.
a well-organized, criminal industry

How would the previous sentence be correctly capitalized?
Answer: A well-organized, criminal industry
the firefighters could be continued unabated even after the failure of one engine, since the vehicle is even fully go and pumpable.

How would the previous sentence be correctly capitalized?
Answer: The firefighters could be continued unabated even after the failure of one engine, Since the vehicle is even fully go and pumpable.
a passenger aircraft is an aircraft which is intended to carry passengers and their luggage.

How would the previous sentence be correctly capitalized?
Answer: A passenger aircraft is an aircraft which is intended to carry passengers and their luggage.