Question: Who wrote the 1966 Beatles song that went on to number one in seven countries?

Context paragraphs:
Wilder Mind: Wilder Mind is the third studio album by British rock band Mumford & Sons.  It was released on 4 May 2015 through Gentlemen of the Road, Island, Glassnote and Universal Music Group.  It was an international success in its first week on sale, charting at number one in seven countries, topping both the UK Albums Chart and the US "Billboard" 200, and reaching the top 5 in nine other countries.  Five singles have been released from the album, "Believe", "The Wolf", "Ditmas", "Tompkins Square Park" and "Just Smoke".

Paperback Writer: "Paperback Writer" is a 1966 song recorded and released by the English rock band the Beatles.  Written by Paul McCartney and John Lennon (credited to Lennon–McCartney), the song was released as the A-side of their eleventh single.  The single went to the number one spot in the United States, United Kingdom, Ireland, West Germany, Australia, New Zealand and Norway.

Johnny Young: Johnny Young (born Johnny Benjamin de Jong; 12 March 1947) is a Dutch Australian singer, composer, record producer, disc jockey, television producer and host.  Originally from the Netherlands, his family settled in Perth, Western Australia in the early 1950s.  Young had a career in the 1960s as a pop singer and had a number one hit with the double-A-side, "Step Back" and "Cara-lyn" in 1966, and his profile was enhanced by a concurrent stint as host of the TV pop program "The Go!!  Show".  As a composer, he penned number one hits, "The Real Thing" and "The Girl That I Love" for Russell Morris, "The Star" for Ross D. Wyllie and "I Thank You" for Lionel Rose and the hit single "Smiley" for Ronnie Burns.  After his pop career ended returned to TV where he presented and produced the popular television show, "Young Talent Time", which screened on Network Ten from 1971 to 1988 – it launched the careers of teen pop stars Jamie Redfern, Debra Byrne, Dannii Minogue and Tina Arena – typically each episode closed with a sing-along rendition of The Beatles song "All My Loving".

Yellow Submarine (song): "Yellow Submarine" is a 1966 song by the Beatles, written by Paul McCartney and John Lennon, with lead vocals by Ringo Starr.  It was included on the "Revolver" (1966) album and issued as a single, coupled with "Eleanor Rigby".  The single went to number one on every major British chart, remained at number one for four weeks, and charted for 13 weeks.  It won an Ivor Novello Award "for the highest certified sales of any single issued in the UK in 1966".  In the US, the song peaked at number two on the "Billboard" Hot 100 chart and became the most successful Beatles song to feature Starr as lead vocalist.

Estonia in the Eurovision Song Contest 1993: Estonia attempted to enter the Eurovision Song Contest 1993, the first time the country tried to enter the Eurovision Song Contest.  However, as Estonia was one of seven countries who wished to join the Eurovision Song Contest for the first time in 1993, a pre-selection was held for the first time to reduce this number to three countries who would compete in the final of the Contest in May, held in Millstreet, Ireland.

Rain (Beatles song): "Rain" is a song by the English rock band the Beatles first released in May 1966 as the B-side of the "Paperback Writer" single.  Both songs were recorded during the sessions for the album "Revolver" although neither appears on that album.

Thankful (Mary Mary album): Thankful is the debut studio album by American duo Mary Mary.  It was released on May 2, 2000 through Columbia Records.  The album comprises urban contemporary gospel, R&B and hip hop soul music.  It produced the smash crossover hit "Shackles (Praise You)", which reached the top-ten in seven countries and the single "I Sings", which was also a significant hit—although it did not match the success of its predecessor.  The album established Mary Mary as one of the leading artists in contemporary Christian music, and won the duo a Grammy Award in 2001.  The album peaked at number one on the US Gospel Albums, number twenty-two on the US "Billboard" Top R&B/Hip-Hop Albums and number fifty-nine on the US "Billboard" 200.  It was certified platinum by the Recording Industry Association of America (RIAA) for selling over 1.2 million copies in the United States.  The album received generally favorable reviews from the music critics: AllMusic gave it a grade of four and a half out of five stars and Cross Rhythms gave it ten out of ten stars.

Western Wireless Corporation: Western Wireless Corporation was a cellular network operator that provided mobile telecommunications service to subscribers in 19 western states and seven countries.  Western Wireless marketed analog cellular service under the CELLULAR ONE brand in 88 FCC-defined rural service areas and digital PCS service under the VoiceStream brand in 19 FCC-defined metropolitan service areas.  At its peak in 2004, Western Wireless provided service to 1.4 million domestic subscribers.  Western Wireless obtained additional revenue from the international operations of its Western Wireless International Corporation subsidiary, which was licensed to provide wireless communications services in seven countries to a total of 1.8 million subscribers.

Funhouse (Pink album): Funhouse is the fifth studio album by American singer and songwriter Pink, released by LaFace Records worldwide on October 24, 2008.  The album debuted at number two on the "Billboard" 200 chart, selling 180,000 copies in its first week and reached number one on the charts in seven countries including Australia, New Zealand, Netherlands and the United Kingdom.  "Funhouse" has sold over six million copies worldwide.

Venus (Shocking Blue song): "Venus" is a 1969 song written by Robbie van Leeuwen.  In 1970, the Dutch rock band Shocking Blue took the song to number one in nine countries.  In 1981 it was sampled as part of the Stars on 45 medley.  In 1986, the British female pop group Bananarama returned the song to number one in seven countries.  The composition has been featured in numerous films, television shows and commercials, and covered dozens of times by artists around the world.

Supporting paragraphs: Rain (Beatles song) Paperback Writer
Answer: Paul McCartney and John Lennon