Table: sega_master_system_games
Columns: main_title_alternate_title_s
developer
publisher
release_date
max_of_players

Question: What is the maximum number of players for the sega game, hang-on (cartridge version)?
SQL: SELECT COUNT("max_of_players") FROM sega_master_system_games WHERE "developer" = 'sega' AND "main_title_alternate_title_s" = 'hang-on (cartridge version)'