Question: Which expressways have their maintenance done by the East Nippon Expressway Company?
Answers:
answer_text: Higashi-Kantō Expressway
answer_text: Ban-etsu Expressway
answer_text: Jōshin-etsu Expressway
answer_text: Jōban Expressway
answer_text: Futtsu Tateyama road
answer_text: Japan National Route 14
answer_text: Kan-Etsu Expressway
answer_text: Keiyo Road
answer_text: Tokyo Gaikan Expressway
answer_text: Fukagawa-Rumoi Expressway
answer_text: Yamagata Expressway
answer_text: Aomori Expressway
answer_text: Chūbu-Ōdan Expressway
answer_text: Sendai-Tobu Expressway
answer_text: Chiba-Tōgane Road
answer_text: Kamaishi Expressway
answer_text: Ken-Ō Expressway
answer_text: Nagano Expressway
answer_text: Sanriku Expressway
answer_text: Sendai-Hokubu Expressway
answer_text: Sendai-Nanbu Road
answer_text: Nihonkai-Tōhoku Expressway
answer_text: Yuzawa Yokote road
answer_text: Tateyama Expressway
answer_text: Kita-Kantō Expressway
answer_text: Hidaka Expressway
answer_text: Do-O Expressway
answer_text: Akita Expressway
answer_text: Shiribeshi Expressway
answer_text: Tohoku Expressway
answer_text: Sasson Expressway
answer_text: Hachinohe Expressway
answer_text: Tōhoku-Chūō Expressway
answer_text: Dōtō Expressway
answer_text: Hokuriku Expressway