With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Las Vegas is the biggest city within the greater Mojave Desert.
text_B: Communist Party -LRB- Reconstructed -RRB- -LRB- Partido Comunista Portugues -LRB- reconstruido -RRB- -RRB- , initially known as Portuguese Communist Party -LRB- Reconstructed -RRB- -LRB- -LSB- Partido Comunista Portugues -LRB- Reconstruido -RRB- , links = no -RSB- -RRB- , was a political party in Portugal .. political party. political party. Portugal. Portugal
not_related.