Table: race_results_47
Columns: year
name
nationality
time
age_category

Question: In which Age Category is Marco Manenti?
SQL: SELECT "age_category" FROM race_results_47 WHERE "name" = 'marco manenti'

Question: Which year has a Time of 13:23:43?
SQL: SELECT "year" FROM race_results_47 WHERE "time" = '13:23:43'