human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Week of, Tier, Winner, Runner-up, Semi finalists
###Question: When the runner-up is listed as Gigi Fernández Natalia Zvereva and the week is 26 June 2 weeks, who are the semi finalists?
gpt
SELECT Semi finalists FROM table WHERE Runner-up = gigi fernández natalia zvereva AND Week of = 26 june 2 weeks