The nouns are Mr. Gates, coach, team, Monday. There are no pronouns in your sentence.
The nouns are Mr. Gates and Monday (proper nouns) coach (common noun) baseball team (compound noun; baseball is called a noun adjunct)
The security guard stood outside the gates.
Bill Gates has great prosperity.
Please open the gates.
Joseph Daniel Gates was a professional baseball player. He played parts of two seasons in Major League Baseball for the Chicago White Sox.
Joe Gates died March 28, 2010, in Gary, IN, USA.
Joe Gates was born October 3, 1954, in Gary, IN, USA.
Indeed, Mr. Gates, your IBM is a good invention.
Gates Brown was born May 2, 1939, in Crestline, OH, USA.
Gates Brown died September 27, 2013, in Detroit, MI, USA.
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You try to make a sentence related to the word. For example: "the warlords seized the the city outside of its gates".