if a driver does not start the race, all bets for this driver become invalid.

How would the previous sentence be correctly capitalized?
Answer: If a driver does not start the race, all bets for this driver become invalid.
mail: click the "block user" button while reading their email message

How would the previous sentence be correctly capitalized?
Answer: Mail: click the "Block User" button while reading their email message
chemical remediation by addition of hydrogen (development stage 3)

How would the previous sentence be correctly capitalized?
Answer: Chemical remediation by addition of hydrogen (development stage 3)
to 74 holiday parks landalgreenparks count 51 in the netherlands, ten in germany, two in belgium, one in czech republic, six in austria, three in switzerland and one in hungary.

How would the previous sentence be correctly capitalized?
Answer: To 74 Holiday parks LandalGreenparks count 51 in the Netherlands, ten in Germany, two in Belgium, one in Czech Republic, six in Austria, three in Switzerland and one in Hungary.