code: func (extr *ContentExtractor) nodesToCheck(doc *goquery.Document) []*goquery.Selection {
  	var output []*goquery.Selection
  	tags := []string{"p", "pre", "td"}
  	for _, tag := range tags {
  		selections := doc.Children().Find(tag)
  		if selections != nil {
  			selections.Each(func(i int, s *goquery.Selection) {
  				output = append(output, s)
  			})
  		}
  	}
  	return output
  }
docs: //returns a list of nodes we want to search on like paragraphs and tables