This is called word analysis.
When you are trying to figure out what a particular word means, you are obviously going to analyze it. Maybe you know what its root means, or you can deduce the meaning based on its prefixes and suffixes. You will probably take into consideration the context and neighboring words in the sentence as well in order to analyze it.
The proposition here is - in. <span>A </span>preposition<span> is a word such as after, in, to, on, and with. </span>Prepositions<span> are usually used in front of nouns or pronouns and they show the relationship between the noun or pronoun and other words in a sentence.</span>
Daniel Hale Williams was the first man to treat an injured human heart. In Chicago of 1893, Williams treated a colored man (what's his name?) with a knife wound in his heart. In a time when African-Americans and white people were racially segregated through discrimination, this hospital (What's the name of the Hospital Williams worked in?) the only one to treat both black and white people. Dr. Williams did x-rays on (the man's name?) to figure out the best way to treat the injury without killing his patient. There was no time to waste. Williams decided to take a chance and open up the man’s chest ignoring the protests of his fellow doctors. They carefully removed bones and muscles, knowing if they messed up they would lose their patient. Williams examined the stab wound to see how far it went. He went farther than the wound to repare a torn blood vessel and stich up the pericardium (a fluid-filled bag that surrounds the hart). He cleaned up the wound after put back the man`s muscle and bones, and stitched up the torn skin. The surgery was completed and (Name of the man?) successfully recovered. Williams made it on the newspaper in an article titled “Sewed Up His Heart". Dr. Williams took the risk to help someone live despite other's protests making him a hero in the history of the medical field.
