With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Gadsden flag was designed.
text_B: In astronomy , spinning dust is a mechanism proposed to explain anomalous microwave emission from the Milky Way .. Milky Way. Milky Way. The emission could arise from the electric dipole of very rapidly spinning -LRB- 10 -- 60 GHz -RRB- extremely small -LRB- nanometer -RRB- dust grains -LRB- Draine & Lazarian 1998 -RRB- , most likely polycyclic aromatic hydrocarbons .. polycyclic aromatic hydrocarbons. polycyclic aromatic hydrocarbons. The anomalous emission was first discovered as a by-product of Cosmic Microwave Background observations which make very sensitive measurements of the microwave sky which have to identify and remove contamination from the galaxy .. Cosmic Microwave Background. Cosmic Microwave Background
not_related.