Table: dragons_den_episodes_4
Columns: episode
first_aired
entrepreneur_s
company_or_product_name
money_requested
investing_dragon_s

Question: What episode featured entrepreneur Richard Ernest?
SQL: SELECT "first_aired" FROM dragons_den_episodes_4 WHERE "entrepreneur_s" = 'richard ernest'

Question: What Investing Dragons had a request of £100,000?
SQL: SELECT "investing_dragon_s" FROM dragons_den_episodes_4 WHERE "money_requested" = '100,000'

Question: What Entrepreneurs requested £60,000?
SQL: SELECT "entrepreneur_s" FROM dragons_den_episodes_4 WHERE "money_requested" = '60,000'

Question: How much was requested from Investing Dragon Peter Jones request in episode 2?
SQL: SELECT "money_requested" FROM dragons_den_episodes_4 WHERE "investing_dragon_s" = 'peter jones' AND "episode" = 'episode 2'