Capitalization of articles at the beginning of a sentence can be viewed as a context sensitivity in the text. However, in the simple English grammar of Figure 6.2, capitalization can be achieved by adding only context-free rules. How could you do this? (Refer to page 211.) sentence --> noun phrase verb-phrase. noun-phrase --> article noun article --> a|the noun --> girl|dog verb-phrase --> verb noun-phrase verb --> sees | pets