With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Portugal shares a border with Russia.
text_B: Atomic Age in design refers to the period roughly corresponding to 1940 -- 1960 , when concerns about nuclear war dominated Western society during the Cold War .. design. design. nuclear war. nuclear war. Western society. Western culture. Cold War. Cold War. Architecture , industrial design , commercial design -LRB- including advertising -RRB- , interior design , and fine arts were all influenced by the themes of atomic science , as well as the Space Age , which coincided with that period .. design. design. Space Age. Space Age. Atomic Age design became popular and instantly recognizable , with a use of atomic motifs and space age symbols .. design. design. Retrofuturism is a current resurgence of interest in Atomic Age design .. design. design. Retrofuturism. Retrofuturism
not_related.