Assertion: special character | /r/HasProperty | percent sign
Facets:
Source sentences:
text: There are relatively few valid characters in a URL: uppercase and lowercase letters of the alphabet; digits “0” through “9”; special characters: dash, underscore, period, exclamation point, asterisk, apostrophe and opening and closing parentheses; and reserved characters: percent sign, dollar sign, ampersand, plus sign, comma, forward slash, colon, semi-colon, equal sign, question mark and “@” symbol.