code: private String getMatchedTabledKeyword(String line) {
      	for (String keyword : Config.TABLE_KEYWORDS) {
      		if (line.startsWith(keyword)) {
      			return keyword;
      		}
      	}
      	return null;
      }
docs: Checks and returns the table caption keyword at the beginning of a give line
  
  @param line
  input line
  @return matched keyword if found / null if not found