Give the number of samples in image no.2377985 whose attribute is electrical.
number of samples refers to OBJ_SAMPLE_ID; image no.2377985 refers to IMG_ID = 2377985; attribute is electrical refers to ATT_CLASS = 'electrical'
SELECT SUM(CASE WHEN T2.ATT_CLASS = 'white' THEN 1 ELSE 0 END) FROM IMG_OBJ_ATT AS T1 INNER JOIN ATT_CLASSES AS T2 ON T1.ATT_CLASS_ID = T2.ATT_CLASS_ID WHERE T1.IMG_ID = 2347915