With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: San Bernardino county is outside of Southern California.
text_B: State Route 50 -LRB- SR 50 -RRB- is a west -- to -- east highway in Middle Tennessee .. Middle Tennessee. Middle Tennessee. The road begins near Only and ends in Altamont .. Only. Only, Tennessee. Altamont. Altamont, Tennessee. The current length is 161.3 mi .
not_related.