With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Fences failed to cast Saniyya Sidney.
text_B: Phenacoccus manihoti is a scale insect species .. In the early 1970s , P. manihoti was accidentally introduced to Africa .. Africa. Africa. Within 15 years of its discovery , it had invaded most of West and Central Africa and was spreading to the East .. Africa. Africa. It soon became an important pest , and methods to control it became a topic of interest .
not_related.