Table:
text: First appearance
First appearances of popular heroes, villains and teams
First appearances of popular heroes, villains and teams
Characters_ First_Appearance Cover_Date Publisher Estimated_Value
Superman Action Comics #1 June 1938 DC Comics $2,100,000
Batman Detective Comics #27 May 1939 DC Comics $475,000
Sandman (Wesley Dodds) Adventure Comics #40 July 1939 DC Comics $60,000
Namor the Sub-Mariner Marvel Comics #1 October 1939 Timely Comics $400,000
Jay Garrick/Flash I ; Hawkman Flash Comics #1 January 1940 All-American Pubs. $95,000
Captain Marvel Whiz Comics #2 February 1940 Fawcett Comics $90,000
Robin Detective Comics #38 May 1940 DC Comics $75,000
The Spectre More Fun Comics #52 February 1940 DC Comics $72,000
Lex Luthor Action Comics #23 May 1940 DC Comics $8,025

Question: What is the total number of publishers whose cover date is May 1939 among first releases?

Question: What is the cover date for character(s) Wesley Dodds' first appearance in Sandman (wesley dodds)?