With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ayutthaya was friendly towards foreigners.
text_B: Chi Ursae Majoris -LRB- Chi UMa , χ Ursae Majoris , χ UMa -RRB- is a star in the constellation Ursa Major .. Ursa Major. Ursa Major. star. star. constellation. constellation. It has the traditional names Alkafzah , Alkaphrah , and El Koprah .. Chi Ursae Majoris is an orange K-type giant with an apparent magnitude of +3.69 .. K-type. stellar classification. giant. giant star. apparent magnitude. apparent magnitude. It is approximately 196 light years from Earth .. light years. light years. Earth. Earth. This star has times the radius of the Sun .. star. star. In Chinese astronomy , Alkafzah is called Tai Yang Show , `` the Sun Governor '' .. Chinese astronomy. Chinese astronomy. The name was possibly derived from the word 太陽守 , Pinyin  : Taiyangshou , meaning Guard of the Sun , because this star is marking itself and stand alone in Guard of the Sun asterism , Purple Forbidden enclosure -LRB- see  : Chinese constellation -RRB- .. star. star. constellation. constellation. Pinyin. Pinyin. Purple Forbidden enclosure. Purple Forbidden enclosure. Chinese constellation. Chinese constellation. The Spiral Galaxy in Ursa Major , NGC 3877 -LRB- = H I. 201 -RRB- , type Sc , is best found from Chi Ursae Majoris , which is almost exactly 15 arc minutes north of the galaxy .. Ursa Major. Ursa Major
not_related.