With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Daddy Yankee's album became the top selling Latin music album of the millennium.
text_B: Madler is a crater on Mars named in honor of the German astronomer Johann Heinrich Madler .. Johann Heinrich Madler. Johann Heinrich Madler. crater. Impact crater. Mars. Mars. It is located at 2.7 ° E 10.7 ° S.. Madler and collaborator Wilhelm Beer produced the first reasonably good maps of Mars in the early 1830s .. Mars. Mars. Wilhelm Beer. Wilhelm Beer. Beer. Beer ( Martian crater ). When doing so , they selected a particular feature for the prime meridian of their charts .. prime meridian. prime meridian. Their choice was strengthened when Giovanni Schiaparelli used the same location in 1877 for his more famous maps of Mars .. Mars. Mars. Giovanni Schiaparelli. Giovanni Schiaparelli. Schiaparelli. Schiaparelli ( Martian crater ). The feature was later called Sinus Meridiani -LRB- `` Middle Bay '' or `` Bay of the Meridian '' -RRB- , but following the landing of the NASA probe MER-B Opportunity in 2004 is perhaps better known as Meridiani Planum .. NASA. NASA. Meridiani Planum. Meridiani Planum. Madler lies in the south of Meridiani Planum , close to the prime meridian and about 10 ° east of Beer .. prime meridian. prime meridian. Meridiani Planum. Meridiani Planum. Beer. Beer ( Martian crater ). Schiaparelli is also in the region .. Schiaparelli. Schiaparelli ( Martian crater )
not_related.