Sentence:  One of the three <WSD>supersigns</WSD> fabricated by County Neon Sign Corp. of Fairview, NY, the Virgin sign is composed of 6"-diameter stainless steel tubes set horizontally, with two bands of red neon running between each pair of tubes. 
Meaning of the word marked with <WSD> tags:  A sign (panel bearing a message) that is highly technologically advanced or otherwise impressive.