Tell me Szymon Wydra's journal's themes.
select t3.theme from journal_committee as t1 join editor as t2 on t1.editor_id = t2.editor_id join journal as t3 on t1.journal_id = t3.journal_id where t2.name = "Szymon Wydra"
How old is he?
select age from editor where name = "Szymon Wydra"
What is the name of the youngest editor?
select name from editor order by age asc limit 1