With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Vienna is Japan's capital.
text_B: Peonidin-3-O-glucoside is anthocyanin .. anthocyanin. anthocyanin. It is found in fruits and berries , in red Vitis vinifera grapes and red wine , in red onions and in purple corn .. Vitis vinifera. Vitis vinifera. red wine. red wine. purple corn. purple corn. It is dark red  /  purple in colour .
not_related.