[Answer] Which U.S. city was home to the first subway system in North America?

Step 1 : Introduction to the question "Which U.S. city was home to the first subway system in North America?"

...Boston holds the distinction of operating the first true subway in North America. The Tremont Street Subway opened on September 1, 1897, built primarily to relieve the overwhelming crowds of horse-drawn streetcars clogging downtown streets. Its early success helped spark a nationwide shift toward underground transit, inspiring larger systems in cities like New York and Philadelphia. Though later overshadowed by those bigger networks, Boston’s subway—today part of the MBTA—remains a pioneering milestone in American transportation history.

[Answer] Which battle marked the deadliest day of the American Civil War?

Step 1 : Introduction to the question "Which battle marked the deadliest day of the American Civil War?"

...The bloodiest single day of the American Civil War took place on September 17, 1862, at the Battle of Antietam in Maryland. More than 22,000 soldiers were killed, wounded, or missing in one day of combat, making it the deadliest single-day battle in American history. Fighting erupted at the Cornfield, the Sunken Road (“Bloody Lane”), and Burnside Bridge. Though tactically inconclusive, the Union’s stand gave President Abraham Lincoln the momentum to issue the Emancipation Proclamation, reshaping the war’s purpose and the nation’s future.

[Answer] What amendment can be invoked to remove a President from office?

Step 1 : Introduction to the question "What amendment can be invoked to remove a President from office?"

...The 25th Amendment, ratified in 1967, clarifies presidential succession and establishes the process for declaring a president unable to discharge the powers and duties of the office. Section 4 of the amendment allows the vice president and a majority of the cabinet to formally declare the president incapacitated—temporarily or permanently—enabling the vice president to assume presidential responsibilities. This provision has never been fully invoked, but it remains a crucial constitutional mechanism designed to maintain stability during moments of presidential disability or crisis.

[Answer] What was the name of the character known as “The Professor” on the sitcom Gilligan’s Island?

Step 1 : Introduction to the question "What was the name of the character known as “The Professor” on the sitcom Gilligan’s Island?"

...Although he was almost always called simply “The Professor,” the character’s full name—Roy Hinkley—was mentioned only once during the show’s entire run. Played by Russell Johnson, the ever-resourceful botanist and science teacher from Cleveland served as the brainy problem-solver among the castaways, building gadgets, conducting experiments, and routinely devising clever (though unsuccessful) plans to get everyone off the island. His seldom-spoken full name has since become a favorite nugget of trivia for fans of the classic television sitcom.

[Answer] Which Cheers cast member got his early break playing Private LaRoche on M*A*S*H?

Step 1 : Introduction to the question "Which Cheers cast member got his early break playing Private LaRoche on M*A*S*H?"

...Before becoming the beloved bar-stool regular Norm Peterson on Cheers, George Wendt made a memorable appearance on M*A*S*H. In the show's Season 11 Halloween episode, he played Private LaRoche, a soldier who arrives at the 4077th with a billiard ball lodged in his mouth—an offbeat role that helped showcase his comedic timing. Just a few years later, Wendt would join the cast of Cheers and turn “Norm!” into one of the most iconic entrances in television history. His brief stop in Korea remains a fun piece of TV trivia linking two classic sitcoms.