Question: What kind of activist is the former child actress who played Bumstead's daughter in the American sitcom "Blondie"?

Context articles: Lauren Chapin
Victoria Paige Meyerink
Bea Nicolas
Stacy Heather Tolkin
Blondie (1968 TV series)
Pamelyn Ferdin
Juanita Quigley
Isabella de Leon
Kaitlin Cullum
Patricia Harty (actress)

Lauren Chapin (born May 23, 1945, Los Angeles, California) is an American former child actress, most remembered for her role as the youngest child "Kathy Anderson" (nicknamed "Kitten") in the television show "Father Knows Best", which was produced between 1954 and 1960.
 Chapin was awarded five Junior Emmys for Best Child Actress.
 Two of her older brothers were also child stars, Billy and Michael Chapin.
Victoria Paige Meyerink (born December 27, 1960) is an award-winning producer and former child actress.
 At the age of four, Meyerink became Danny Kaye's co-star on the CBS variety series "The Danny Kaye Show" and, in 2006, was honored by the Young Artist Foundation with its Former Child Star "Lifetime Achievement" Award for her role on the series.
Bea Nicolas (born Beatrice Faye Cancio Nicolas on April 15, 1994) is a Filipino former child actress in film and television.
 Her older sister is former child actress Iwi Nicolas.
 Nicolas is a licensed Medical technologist.
Stacy Heather Tolkin is a former child actress who played the part of Irina in "The Concorde ... Airport '79", and voiced a number of 1983 television productions featuring Charles Schulz Peanuts characters.
 Tolkin also voiced Sally Brown and Truffles in "The Charlie Brown and Snoopy Show".
 She also played Herb Tarlek's daughter in a few episodes of "WKRP In Cincinnati".
 As a child actress, Tolkin was in over a hundred commercials including McDonald's, Grandma's Cookies, and Kellogg's Corn Flakes.
 She was also on the cover of the Kellogg's Corn Flakes box.
 Tolkin played Bonnie Franklin's daughter in the TV movie, "Portrait of a Rebel: Margaret Sanger".
Blondie (also known as The New Blondie) is an American sitcom that aired on CBS during the 1968–69 television season.
 The series is an updated version of the 1957 TV series that was based on the comic strip of the same name.
 The series stars Patricia Hart at the title character and Will Hutchins as her husband Dagwood Bumstead.
 Jim Backus played Dagwood's boss Mr. Dithers, with his real life wife Henny Backus playing Cora Dithers.
 The series also featured the noted child character actress Pamelyn Ferdin as the Bumstead's daughter, Cookie and character actor Bryan O'Byrne as the hapless mailman, always getting run over by Dagwood hurrying out the door, late for work.
Pamelyn Wanda Ferdin (born February 4, 1959) is an American former child actress and animal rights activist.
Juanita Quigley (born 24 June 1931) is a former child actress in American motion pictures of the 1930s and 1940s.
 She had a sister, Rita Quigley, who was also a child actress.
Isabella de Leon or Isabelle de Leon (born July 30, 1994 in Manila) is a Filipino actress, singer and songwriter.
 She was a former child actress, known to many as Duday in GMA-7's sitcom "Daddy Di Do Du" (2001).
 She garnered a FAMAS Best Child Actress award for her role in "Magnifico" (2003).
Kaitlin Cullum (born June 24, 1986) is an American actress.
 As a child actress, she is best known for her role as Libby Kelly in the sitcom "Grace Under Fire".
 Her older sister Kimberly Cullum is also a former child actress.
Patricia Harty (born November 5, 1941 in Washington, D.C.), also known professionally as Trisha Hart, is an American actress.
 She is known for her starring roles in several short-lived television series, "Occasional Wife" (1966-67) as Greta Patterson, "Blondie" (1968) as the titular Blondie Bumstead, "The Bob Crane Show" (1975) as Ellie Wilcox and "Herbie, the Love Bug" (1982) as Susan MacLane.
 She also appeared on Broadway in "Fiorello!
" and "Sail Away".