What are the characters and duration of actors?
SELECT Character ,  Duration FROM actor
SELECT Character ,  Duration FROM actor
[{'Character': 'Alf Stewart', 'Duration': '1988—'}, {'Character': 'Lou Carpenter', 'Duration': '1988, 1992—'}, {'Character': 'Irene Roberts', 'Duration': '1993—'}, {'Character': 'Sally Fletcher', 'Duration': '1988–2008, 2013'}, {'Character': 'Karl Kennedy', 'Duration': '1994—'}, {'Character': 'Susan Kennedy', 'Duration': '1994—'}, {'Character': 'Toadfish Rebecchi', 'Duration': '1995, 1996—'}, {'Character': 'Harold Bishop', 'Duration': '1987–1991, 1996–2009, 2011'}, {'Character': 'Paul Robinson', 'Duration': '1985–1992, 1993, 2004—'}]