Question: On what network did an American actress portray Shirley Partridge, along with David Cassidy, beginning in 1970?

Context paragraphs:
The Partridge Family Album: The Partridge Family Album is The Partridge Family's first album.  It was released in 1970 and included their first recording, "I Think I Love You".  It has a picture of the whole family on the back and a small picture of David Cassidy and Shirley Jones.  The album cover is made to look like an old-fashioned photo album.  The original release of the album included a framed color photograph of the group.  The exterior label promoting the inclusion of the hit song was affixed to the jacket itself, not the shrink wrap.

David Cassidy: Man Undercover: David Cassidy: Man Undercover (the word "undercover" in the series title appeared at various times written as one word or two) was an American police drama starring David Cassidy, four years after his run starring in the "The Partridge Family", marking his first starring role since that series was cancelled.  The series was spun off after Cassidy starred in a special two-hour episode of "Police Story", titled "A Chance to Live," which aired in May 1978; this episode served as the pilot for "Man Undercover".

David Cassidy discography: The discography of David Cassidy, an American pop artist, consists of twelve studio albums, three live albums, six compilation albums, two soundtrack albums, and twenty-four singles.  David Cassidy has been recording albums since 1970.  His career is most notable for his solo music and his recordings with the Partridge Family.

David Cassidy: David Bruce Cassidy (born April 12, 1950) is a retired American actor, singer, songwriter, and guitarist.  He is known for his role as Keith Partridge, the son of Shirley Partridge (played by his stepmother Shirley Jones), in the 1970s musical-sitcom "The Partridge Family", which led to his becoming one of popular culture's teen idols and pop singers of the 1970s.  He later had a career in both acting and music.

Old Trick New Dog: Old Trick New Dog is a 1998 album from David Cassidy on his own Slamajama Records label.  In addition to new songs, it also features several remakes of songs from "The Partridge Family".  The single lifted from the album - "No Bridge I Wouldn't Cross" - was an Adult Contemporary Top 25 hit in the USA.  The track - "You Were The One" - was co-written by David Cassidy and Tony Romeo who wrote many of the most popular songs for Cassidy and The Partridge Family in the 1970s, including I Think I Love You, "Summer Days", "I Am A Clown" and "Sing Me".

I Think I Love You: "I Think I Love You" is a song composed by songwriter Tony Romeo in 1970.  It was released as the debut single by The Partridge Family pop group, featuring David Cassidy on lead vocals and Shirley Jones on background vocals.  The Partridge Family version was a number-one hit on the "Billboard" Hot 100 in November 1970.  The alternative rock band Voice of the Beehive scored a hit cover version of their own in 1991.  There have also been many other cover versions of this song, most notably, Perry Como, Kaci, Katie Cassidy, Paul Westerberg, Constantine Maroulis, and the new "In Search of the Partridge Family" cast on VH1.

Shirley Jones: Shirley Mae Jones (born March 31, 1934) is an American singer and actress of stage, film and television.  In her six decades of show business, she has starred as wholesome characters in a number of well-known musical films, such as "Oklahoma! " (1955), "Carousel" (1956), and "The Music Man" (1962).  She won the Academy Award for Best Supporting Actress for playing a vengeful prostitute in "Elmer Gantry" (1960).  She played the lead role of Shirley Partridge, the widowed mother of five children, in the musical situation-comedy television series "The Partridge Family" (1970–74), which co-starred her real-life stepson David Cassidy, son of Jack Cassidy.

A Partridge Family Christmas Card: A Partridge Family Christmas Card was originally released as a vinyl album of Christmas music in 1971.  The case of the album contains a reproduction of a Christmas card that was signed by the whole Partridge Family, the stars of a 1970s sitcom.  The song "My Christmas Card to You" was original, but the remainder of the tracks were standards.  Like most of the Partridge Family songs, the lead vocals are sung by David Cassidy, who played Keith Partridge in the show.  The album also features one of the few Partridge Family recordings featuring Shirley Jones as the lead singer ("The Christmas Song").

Greatest Hits (Partridge Family album): The Partridge Family's Greatest Hits album was issued by Arista in 1989.  It was never released on vinyl, only on cassette and compact disc, and is the first Partridge Family album to ever be released on CD.  It contains 16 songs, including the TV show's second theme song, "Come on Get Happy" which was never featured on a Partridge family album, and two songs by David Cassidy as a solo act: "Cherish" and "Could It Be Forever".  It has liner notes by Danny Bonaduce and a Partridge Family trivia quiz.  The cover has a picture of a period lunchbox with a cartoon picture of the family in red velvet suits.

The Partridge Family: The Partridge Family is an American musical-sitcom starring Shirley Jones and featuring David Cassidy.  Jones played a widowed mother, and Cassidy played the oldest of her five children who embarked on a music career.  It ran from September 25, 1970, until March 23, 1974, on the ABC network as part of a Friday-night lineup, and had subsequent runs in syndication.  The family was loosely based on the real-life musical family The Cowsills, a popular band in the late 1960s and early 1970s.

Supporting paragraphs: The Partridge Family Shirley Jones
Answer: ABC