Historical clue formulations

• Actress/singer Pia — 2016-04-18
• See 13-Down — 2016-01-20
• Actress Pia — 2013-01-29
• Golden Globe winner Pia — 2010-07-11
• "Butterfly" actress, 1981 — 2010-02-28
• "Butterfly" star, 1981 — 2009-01-03
• Actress Pia — 2008-12-03
• "Butterfly" actress, 1981 — 2007-12-28
• Actress Pia — 2001-07-08