What week did the member who's original tribe was shark and who was sent to the third island on week 14 arrive on the main island?
create table table_11764007_2 (week_arrived_on_main_island varchar, original_tribe varchar, week_sent_to_third_island varchar, PRIMARY KEY (week_arrived_on_main_island))
select week_arrived_on_main_island from table_11764007_2 where original_tribe = "shark" and week_sent_to_third_island = "14"