Does Section 667, subdivision (a)(1) of the California Criminal Code add an additional 5-year term to the sentence for a serious felony?

Section 667, subdivision (a) adds a five-year term to the sentence for a serious felony if the defendant has suffered a prior conviction for the commission of a serious felony. When the defendant has suffered prior strike convictions, the five-year term for each prior serious felony is added to each count for which the defendant is convicted. (People v. Williams (2004) 34 Cal.4th 397, 403-404.) However, the five-year enhancement applies only "for each such prior conviction on charges brought and tried separately." ( 667, subd. (a)(1).)