With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Rich Girl (Gwen Stefani song) was nominated for Best Rap/Sung Collaboration at the Grammy Awards.
text_B: Oswald Charles Eugene Marie Ghislain de Kerchove de Denterghem -LRB- 1 April 1844 -- 20 March 1906 -RRB- , was a Belgian liberal politician .. Belgian. Belgium. Oswald de Kerchove was a son of the Ghentian mayor Charles de Kerchove de Denterghem .. mayor. mayor. Charles de Kerchove de Denterghem. Charles de Kerchove de Denterghem. De Kerchove was a lawyer and became a liberal senator .. lawyer. lawyer. senator. Belgian Senate. He was governor in Hainaut from 1878 to 1884 .. governor. governor. Hainaut. Hainaut ( province ). He was an internationally recognized authority in the study of palms and orchids .
not_related.