With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Rich Girl features a rapper.
text_B: Pan Voyevoda -LRB- Пан воевода , transliteration Pan vojevoda ; Polish Pan wojewoda -- literally The Gentleman Provincial Governor -RRB- , is an opera by Nikolai Rimsky-Korsakov .. opera. opera. Nikolai Rimsky-Korsakov. Nikolai Rimsky-Korsakov. It is based on a libretto by Ilya Tyumenev .. libretto. libretto. Ilya Tyumenev. Ilya Tyumenev. The work was completed in 1903 , was first performed in October 1904 , and has proved to be one of Rimsky-Korsakov 's least-successful works .. This is due to the ramshackle , melodramatic plot rather than the quality of the music , which at its best -LRB- notably in the woodland scenes and dances -RRB- approaches the poetic , lyric grace of Smetana , Dvorak and the spirit of the work 's dedicatee , Frederic Chopin .. Smetana. Bedrich Smetana. Dvorak. Antonin Dvorak. Frederic Chopin. Frederic Chopin
not_related.