Question: What year was the band who sings "Silver Star" formed?

Context articles: Silver Star Holidays
Silver Star (1910 song)
Citation Star
Frankie Valli
Silver Star
2004 Australian Drivers' Championship
Silver Star (Amtrak train)
Silver Star (NZR train)
Silver Star (song)
USS Leftwich

Silver Star Holidays is a coach operating company based in Caernarfon, Gwynedd, Wales.
 Founded in 1918, its primary operation is coach holiday tours.
 Local bus services in Gwynedd were run by Silver Star until November 2010, when they were sold to Express Motors.
 Silver Star also trades under the Welsh name Seren Arian, with offices is both Caernarfon and Wrexham.
 The company entered administration on 6 October 2011 and ceased operation, but resumed services under new management later in the same month.
"Silver Star" is an intermezzo composed by Charles L. Johnson in 1910.
 In 1911, William R. Clay added lyrics which tell of an Indian warrior eloping with an unnamed Indian maiden whom he refers to as his "silver star".
The Citation Star was a Department of the Army personal valor decoration issued as a ribbon device which was first established by the United States Congress on July 9, 1918 (Bulletin No. 43, War Dept. 1918).
 When awarded, a 3/16 inch silver star was placed on the suspension ribbon and service ribbon of the World War I Victory Medal to denote a Citation (certificate) for "Gallantry In Action" was awarded to a soldier, or to a Marine or sailor (Navy corpsman) attached to the Army's Second Division (2nd Infantry Division), American Expeditionary Forces.
 The Citation Star was replaced in 1932 with the introduction of the Silver Star Medal.
Frankie Valli (born Francesco Stephen Castelluccio; May 3, 1934) is an American singer, known as the frontman of The Four Seasons beginning in 1960.
 He is known for his unusually powerful head voice.
The Silver Star Medal, unofficially the Silver Star, is the United States military's third-highest personal decoration for valor in combat.
 The Silver Star Medal is awarded primarily to members of the United States Armed Forces for gallantry in action against an enemy of the United States.
The 2004 Australian Drivers' Championship was an Australian motor racing competition open to Formula 4000 cars.
 It was the 48th Australian Drivers' Championship and the sixteen and last to be contested by Formula Holden / Formula Brabham / Formula 4000 cars.
 The championship winner was awarded the 2004 CAMS Gold Star and the Silver Star Trophy was awarded to the winner of the "Silver Star" class which was restricted to approved competitors.
The Silver Star is a 1522 mi passenger train route in the "Silver Service" brand operated by Amtrak, running from New York City south to Miami, Florida via the Northeast Corridor to Washington, D.C., then via Richmond, Virginia; Raleigh, North Carolina; Columbia, South Carolina; Savannah, Georgia; Jacksonville, Florida; Orlando, Florida; and Tampa, Florida.
 The "Silver Star" shares much of its track with the "Silver Meteor", which runs further east through North Carolina and South Carolina.
The Silver Star was a luxury passenger train that ran overnight between Auckland and Wellington on the North Island Main Trunk railway of New Zealand.
 The train ran from Monday, 6 September 1971 until Sunday, 8 June 1979.
 It replaced the "Night Limited" express passenger trains, which provided a faster service than the "Ordinary" Expresses by stopping at only six intermediate stations en route and not dragging postal or parcels vans at the rear.
 Designed as a "hotel on wheels", its carriages were distinctive in New Zealand; rather than being painted in the traditional red, the "Silver Star"' s carriages were made of stainless steel, and silver in appearance.
 Original planning of the train envisaged the sleeping cars being the basis of new standard NZR passenger stock with future passenger trains of 6 carriages and van, 7 stainless steel units of 30 tons each (210) tons pulled by a 1425 hp DA.
 However planning for the Limited replacement became more ambitious in the early 1960s, moving away from 25 ton, 55 ft stainless carriages of the type used on the 3 ft 6inch, QR Sunlander to sleeping cars of standard gauge 9 ft 9inch, standard gauge loading gauge.
 As a result the usual Silver star consist of 35 ton carriages would weigh 410 tons and lead to the order for superpower DX locomotive of 2750 hp from General Electric to pull them and express freight on the NIMT and result in a large trackside work on the NIMT and the Silver stars alternative route via Marton- Wanganu-Stratford - Taurmaranui, to accommodate standard gauge width carriages running on 3 ft 6 inch.
"Silver Star" is the lead song on the Four Seasons album "Who Loves You".
 As was the case of all the songs on the LP, it was written by Bob Gaudio and Judy Parker and produced by Gaudio.
 Drummer Gerry Polci sang lead.
 Frankie Valli's contribution was limited to harmony vocals, since he was gradually losing his hearing in the 1970s due to otosclerosis.
 An operation restored most of Valli's hearing in the 1980s.
USS "Leftwich" (DD-984) was a "Spruance"-class destroyer built by the Ingalls Shipbuilding Division of Litton Industries at Pascagoula, Mississippi.
 She was named for Lieutenant Colonel William G. Leftwich, Jr., USMC (1931–1970), who was killed in action at Quang Nam in the Republic of Vietnam on 18 November 1970 in a helicopter crash during the extraction of one of his reconnaissance teams.
 For this action, Lieutenant Colonel Leftwich received the Silver Star.
 Lieutenant Colonel Leftwich's medals and awards include: the Navy Cross, the Silver Star (posthumous), the Legion of Merit with Combat "V” and two gold stars, the Meritorious Service Medal, the Air Medal with one gold star, the Purple Heart with two gold stars, and various personal awards from the Republic of Vietnam.