The nearest found maser object is G100.254+1.278 (offset by 1.1" from input coordinates)
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display_aladin("328.9761025","56.2163580","G100.254+1.278","G100.254+1.278","21542+5558, G100.2532+01.2782, IRAS21542+5558, IRAS 21542+5558","0")