Table: race_results_106
Columns: result
date
race
venue
group
distance
weight_kg
jockey
winner_2nd

Question: What was the race of the jockey in na group in 4th place?
SQL: SELECT "race" FROM race_results_106 WHERE "group" = 'na' AND "result" = '4th'

Question: How far did p. carbery run to get 2nd?
SQL: SELECT "distance" FROM race_results_106 WHERE "jockey" = 'p. carbery' AND "result" = '2nd'