First appearance

Columns: Character ( s ) | First Appearance | Cover Date | Publisher | Estimated Value
The Spectre | More Fun Comics # 52 | February 1940 | DC Comics | $ 72,000 | Lex Luthor | Action Comics # 23 | May 1940 | DC Comics | $ 8,025 | The Joker ; Catwoman | Batman # 1 | Spring 1940 | DC Comics | $ 160,500 | Green Lantern | All-American Comics # 16 | July 1940 | All-American Pubs | $ 131,250 | Captain America | Captain America Comics # 1 | March 1941 | Timely Comics | $ 125,250 | Aquaman ; Green Arrow | More Fun Comics # 73 | November 1941 | DC Comics | $ 10,050 | Wonder Woman | All Star Comics # 8 | December 1941 | All-American Pubs | $ 60,000

Example questions:
Who created the company that published the first appearance of Fantastic Four ? | Who was the writer that helped create the first appearance of the earliest seen character ? | Who is the mother of the character that 's first appearance has appeared in the most recent date ? | When was the comic book publisher that was responsible for the first appearance of Dr. Doom started ? | Who started the company that published the first appearance of The Hulk ?

Answers:
Martin Goodman | Jerry Siegel | Mary Parker | 1939 | Martin Goodman