With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Kumail Nanjiani completed a romantic comedy screenplay.
text_B: Potassium sulfide is the inorganic compound with the formula K2S .. inorganic compound. inorganic compound. The colourless solid is rarely encountered , because it reacts readily with water , a reaction that affords potassium hydrosulfide -LRB- KSH -RRB- and potassium hydroxide -LRB- KOH -RRB- .. potassium hydrosulfide. potassium hydrosulfide. Most commonly , the term potassium sulfide refers loosely to this mixture , not the anhydrous solid .
not_related.