With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Liberia held an election in 2005.
text_B: Shunting is a concept in neurophysiology .. Shunting. Shunting. Shunting may also refer to  :. Shunting. Shunting. Ribosome shunting , a mechanism in protein biosynthesis. Ribosome shunting. Ribosome shunting. Shunting -LRB- rail -RRB- , a rail transport operation. Shunting. Shunting
not_related.