A. Poison ivy, poison oak, and poison sumac are plants that contain an irritating, oily sap called urushiol. Urushiol triggers an allergic reaction when it comes into contact with skin, resulting in an itchy rash, which can appear within hours of exposure or up to several days later.
Vienna  is a song from Billy Joel 's 1977 album The Stranger, released as the B-side to his  She's Always a Woman  single. In a July 2008 New York Times article, Joel cited this as one of his two favorite songs, along with Summer, Highland Falls.
The song was re-introduced in 1942 in the film Casablanca. It was sung by Sam (Dooley Wilson); Sam's piano accompaniment was played by pianist Elliot Carpenter. The song is heard throughout the film as a leitmotif. Wilson was unable to record his version of the song at the time due to the 1942â44 musicians' strike. On the television show Supernatural, in the season 8 episode As Time Goes By, the song is played to the baby John Winchester, in the year 1958, on glockenspiel put up by his father, who was wearing a Bogart-style trenchcoat).