Question: WRDM-CD is available on channel 20 of a digital cable television service serving how many customers?
Sentence (from "Cox Communications"): It is the third-largest cable television provider in the United States, serving more than 6.2 million customers, including 2.9 million digital cable subscribers, 3.5 million Internet subscribers, and almost 3.2 million digital telephone subscribers, making it the seventh-largest telephone carrier in the country.
Relevant evidence: Yes