Question: How many in debt customers in the household market segment are from Russia?
SQL: SELECT COUNT(T1.c_custkey) FROM customer AS T1 INNER JOIN nation AS T2 ON T1.c_nationkey = T2.n_nationkey WHERE T1.c_acctbal < 0 AND T1.c_mktsegment = 'HOUSEHOLD' AND T2.n_name = 'RUSSIA'