to summarise the literature reviewed into a few key messages, the following findings of the existing studies conducted by recognised organisations can be highlighted:

How would the previous sentence be correctly capitalized?
Answer: To summarise the literature reviewed into a few key messages, the following findings of the existing studies conducted by recognised organisations can be highlighted:
interestingly, studies have not found an increased risk of osteoarthritis in long-distance runners.

How would the previous sentence be correctly capitalized?
Answer: Interestingly, studies have not found an increased risk of osteoarthritis in long-distance runners.
in general, the interface of all the games is similar, with the playing field and the options as checkers - this is a game that does not require in excess of graphs. you want fun and profitable pastime and play an entertaining game? then play checkers online are waiting for you on our site.

How would the previous sentence be correctly capitalized?
Answer: In general, the interface of all the games is similar, with the playing field and the options as checkers - this is a game that does not require in excess of graphs. You want fun and profitable pastime and play an entertaining game? Then play checkers online are waiting for you on our site.
if the customer travels in multiple travel classes during an award journey, the cost of that award will calculated based on the highest travel class.

How would the previous sentence be correctly capitalized?
Answer: If the customer travels in multiple travel classes during an award journey, the cost of that award will calculated based on the highest travel class.