Question: What is the relationship between object sample no.12 and no.8 of image no.2345511?
SQL: SELECT T1.PRED_CLASS FROM PRED_CLASSES AS T1 INNER JOIN IMG_REL AS T2 ON T1.PRED_CLASS_ID = T2.PRED_CLASS_ID WHERE T2.IMG_ID = 2345511 AND T2.OBJ1_SAMPLE_ID = 12 AND T2.OBJ2_SAMPLE_ID = 8