If a word is capitalized in the middle of a properly wriiten sentence chances are the word is

The word is a proper noun

Explanation:

A proper noun is the name given to something to make it more specific. These types of nouns contrast with common nouns, which are nouns used for anything else. Common nouns are only capitalized when they begin a sentence.

i love this article you wrote. it is intresting and i was convinced by it. at the ending you could say something like this, "support robots today if you agree." but so far so good. you did an awesome job : ).

explanation:

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).