Personal relationships of Paul McCartney "gave me the strength and courage to work again", after the break-up of the Beatles. McCartney adopted her daughter from her first marriage, Heather, and had three children together: Mary, Stella, and James McCartney. McCartney taught Linda to play keyboards, and permanently included her in the line-up of Wings. Linda died of breast cancer at age 56 in Tucson, Arizona, on 17 April 1998; McCartney denied rumours that her death was an assisted suicide. Along with eight other British composers, he contributed to the choral album "A Garland for Linda", and dedicated his classical album, "Ecce Cor Meum", to his
Paul McCartney and in 1999 he spent £3,000,000 to ensure Linda McCartney Foods remained free of genetically engineered ingredients. In 1995, he narrated the documentary "Devour the Earth", written by Tony Wardle. McCartney is a supporter of the animal-rights organisation People for the Ethical Treatment of Animals. He has appeared in the group's campaigns, and in 2009 McCartney narrated a video for them titled "Glass Walls", which was harshly critical of slaughterhouses, the meat industry, and their effect on animal welfare. McCartney has also supported campaigns headed by the Humane Society of the United States, Humane Society International, World Animal Protection, and