With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Calling All the Monsters was released on a date in the 21st century.
text_B: Traditional bachata is a subgenre of Bachata -LRB- music -RRB- .. It refers to the acoustic style of bachata that was popular in the Dominican Republic from the 1960s until about 1990 .. For most of that period , bachata was performed with two nylon string guitars -LRB- often with fishing line for string -RRB- , an acoustic upright bass or marimbula , maracas , and bongo drum .. marimbula. marimbula. maracas. maracas. bongo. bongo drum. Towards the end of the 1980s , Blas Duran and other bachata artists began to perform with electric guitar , and replaced the maracas with the guira .. maracas. maracas. Blas Duran. Blas Duran. guira. guira. The new style that took root is referred to as modern bachata .. modern bachata. modern bachata. Traditional bachata drew on a variety of influences including musica Jibarra from Puerto Rico , ranchera from Mexico , and bolero and son from Cuba .. musica Jibarra. musica Jibarra. Puerto Rico. Puerto Rico. ranchera. ranchera. Mexico. Mexico. bolero. bolero. Cuba. Cuba. Of these genres , traditional bachata is most closely related to bolero , from which it draws its rhythmic structure .. bolero. bolero. But traditional bachata bands played son , merengue , and waltz in addition to bolero based songs .. bolero. bolero. merengue. merengue music. waltz. waltz. Over time , the influence of merengue began to be felt more in the style of bolero based bachata .. bolero. bolero. merengue. merengue music. The introduction of the guira , a merengue instrument , and merengue adapted guitar riffs and rhythmic sections marked the evolution of modern bachata .. guira. guira. modern bachata. modern bachata. merengue. merengue music
not_related.