Question: What is the birth date of the woman Paul McCartney was engaged to after Linda McCartney's death?

Context paragraphs:
She's My Baby (Wings song): "She's My Baby" is a song credited to Paul and Linda McCartney that was first released by Wings on their 1976 album "Wings at the Speed of Sound".  It is a love song sung by Paul directed at Linda.  Critical opinion of the song has ranged from a description as Paul McCartney's "sweetest, daftest love song" to a suggestion that it deserves an "honor for sheer awfulness."  In 1998, after Linda's death, Paul McCartney rearranged the song for string quartet to be played at memorial concerts for his late wife.  This version was included on the 1999 album "Working Classical".

The Linda McCartney Story: The Linda McCartney Story is a 2000 American drama television film directed by Armand Mastroianni, starring Elizabeth Mitchell and Gary Bakewell.  Based on the book "Linda McCartney: The Biography", presenting the life story of Linda McCartney and her life with Paul McCartney.  The film was shot in Vancouver, British Columbia, Canada for CBS and was released in 2000.

Heather Mills: Heather Anne Mills (born 12 January 1968) is an English media personality, businesswoman and activist.

Give My Regards to Broad Street (film): Give My Regards to Broad Street is a 1984 British musical drama film directed by Peter Webb, which starred Paul McCartney, Bryan Brown and Ringo Starr.  The film covers a fictional day in the life of Paul McCartney, who wrote the film for the screen, and McCartney, Starr and Linda McCartney all appeared as themselves.  Despite "Give My Regards to Broad Street" being unsuccessful in the box office financially and critically, its soundtrack album sold well.  The title is a take on George M. Cohan's classic show tune "Give My Regards to Broadway" which made reference to London's Broad Street railway station, which would close in 1986.

Concert for Linda: The Concert for Linda was a benefit tribute to Linda McCartney, wife of Paul McCartney.  It was held at the Royal Albert Hall in London on 10 April 1999.  Linda McCartney died after a long battle with cancer nearly a year earlier, when she was 56.  They were married for 29 years.

James McCartney: James Louis McCartney (born 12 September 1977) is a British musician and songwriter living in London.  He is the only son of songwriter and former Beatle Paul McCartney and Linda McCartney.  He has contributed to a number of solo albums by his parents, including "Flaming Pie" (1997) and "Driving Rain" (2001) by Paul McCartney and "Wide Prairie" (1998) by Linda McCartney.

Driving World Tour: The Driving World Tour was Paul McCartney's first concert tour of the 21st century and of any kind since 1993's New World Tour.  For the first time in nearly a decade, McCartney returned to the road following the death of first wife, Linda McCartney, the death of George Harrison, and 9/11.  This was in promotion of his 2001 album "Driving Rain".  Paul "Wix" Wickens returned on keyboards and is credited as Musical Director.  New to the fold were Americans Rusty Anderson, Brian Ray, and Abe Laboriel Jr. Paul McCartney's then-fiancée Heather Mills accompanied him on the tour and was in the audience for every American performance.

Lee Eastman: Lee Eastman, born Leopold Vail Epstein (12 January 1910 – 30 July 1991) was a New York City show business attorney, and art collector the son of Louis (b. Russia ~1887, imm.  1906) and Stella (Freyer) Epstein.  His sisters were Emmaline and Rose.  He married Louise Lindner, daughter of a prominent Cleveland department store executive; they had four children, including John Eastman and Linda McCartney, the late wife of former Beatle Paul McCartney.  Eastman became McCartney's business manager shortly before the breakup of The Beatles while his son John represented McCartney during his 1970 lawsuit to legally dissolve the Beatles.  He is the maternal grandfather of potter Heather McCartney, photographer Mary McCartney, fashion designer Stella McCartney, and musician/sculptor James Louis McCartney.  Eastman was also the friend and longtime lawyer for and collector of the works of the Abstract expressionist painter Willem de Kooning.

Warm and Beautiful: "Warm and Beautiful" is a song credited to Paul and Linda McCartney that was first released by Wings on their 1976 album "Wings at the Speed of Sound".  It is a love ballad sung by Paul directed to Linda.  Critical opinion of the song has varied widely, ranging from a comment that it is "one of the most beautiful songs that Paul ever wrote for Linda," to a suggestion that it may be "one of the worst songs Paul McCartney has ever written."  In 1998, after Linda's death, Paul rearranged the song for string quartet to be played at memorial concerts for his late wife.  This version was included on the 1999 album "Working Classical".

Linda McCartney's Sixties: Linda McCartney's Sixties: Portrait of an Era (published on 13 October 1992) is a book by Linda McCartney which presents a number of selected photographic portraits of rock legends.  "Linda McCartney's Sixties: Portrait of an Era" continues to be the most famous work by McCartney.  The text was written from interviews with Linda by Steve Turner who would go on to write 'A Hard Day's Write: The Stories Behind Every Beatles' Song' and 'The Gospel According to the Beatles.'

Supporting paragraphs: Driving World Tour Heather Mills
Answer: 12 January 1968