Question: What is a birthday of one of the sons of Tim Kennelly?
Context: The Kennelly–Heaviside layer, named after Arthur E. Kennelly and Oliver Heaviside, also known as the E region or simply the Heaviside layer, is a layer of ionised gas occurring between roughly 90–150 km (56–93 mi) above the ground — one of several layers in the Earth's ionosphere.  It reflects medium-frequency radio waves, and because of this reflection, radio waves can be propagated beyond the horizon. Tobin was born in County Clare, Ireland, to John and Bridget (Kennelly) Tobin.  His father was a shopkeeper, and the family Roman Catholic.  He attended public school in Ireland, but did not graduate.  In August 1898, he married Annie Reagan.  The couple had five sons and one daughter. Brendan Kennelly (born 1936) is an Irish poet and novelist.  Now retired from teaching, he was Professor of Modern Literature at Trinity College, Dublin until 2005.  Since his retirement he has been titled "Professor Emeritus" by Trinity College.  He is father to one daughter, Doodle Kennelly and is also grandfather to Doodle's three daughters: Meg, Hannah and Grace. Thomas Robert Bohrer (born August 6, 1963) is an American rower.  He has won two silver medals in the men's coxless fours.  One at the 1992 Summer Olympics in Barcelona and the other at the 1988 Summer Olympics in Seoul along with Richard Kennelly, David Krmpotich, and Raoul Rodriguez. Tadhg Kennelly (born 1 July 1981) is an Irish sportsperson known for his top level careers in both Gaelic football and Australian rules football.  He is the only holder of both an AFL Premiership medallion and a Senior All-Ireland Championship medal, the highest possible achievement in both sports.  He has also represented Ireland in the International Rules Series. Noel Kennelly is a footballer from the Listowel Emmets club in North Kerry.  He is a son of former Kerry great Tim Kennelly and older brother of Tadhg Kennelly.  He won an All Ireland Medal with Kerry in 2000.  He won an All Ireland Under 21 medal in 1998 and played in the losing final of 1999, he also played in the losing All Ireland Minor final in 1996. Listowel Emmets is a Gaelic Athletic Association club based in Listowel, County Kerry, Ireland.  They play in Division 3 of the County Football league and in the Kerry Intermediate Football Championship.  Famous players from the club include Tim Kennelly, and his 2 sons Tadhg and Noel and his famous brother Eamon. The New York Giants, an American football team which plays in the National Football League (NFL), have had a long, and at times turbulent financial history.  The Giants were founded in 1925 by businessman and bookmaker Tim Mara with an investment of 500 US$, and became one of the first teams in the then five-year-old NFL.  Mara passed ownership of the team on to his sons Wellington and Jack after the 1929 Stock Market Crash to insulate the team from creditors.  At first the Mara sons owned the team in name only, but they took increasingly larger roles in the organization beginning in the mid-1930s.  Tim Mara remained involved in the team's operations until his death in 1959, when his sons assumed full control of the club.  After Jack's passing in 1965, his son, Tim, took over his share of the team. Sheila Kennelly (28th December, Marine Square, Brighton, Sussex), also credited as Sheila Kenneally, is an English-born Australian character actress of theatre, television and film, with a vast repertoire spanning over 50 years in the industry, she came to Australia with her family, attending North Sydney Girls' High School and trained at the Independent theatre.  She has played several television soap opera and comedy relief roles starting in the 1970s.  Sheila appeared in plays starting her career on the stage, appearing at such venues as Old Tote Theatre and Nimrod Theatre Company before a lengthy Arts Council tour of "A View from the Bridge" (playing Beatrice) as well as many roles at Neutral Bay Music Hall and worked on plays at the ABC, before becoming a household name in soap opera "Number 96" in Australia as bubbly barmaid Norma Whittaker along with her on-screen husband Les Whittaker (Gordon McDougall) the duo were comedy characters added to the cast of the series a few months after it premiered in 1972, she remained with 96 for 4 and half years, and featured in the series film version in 1974.  In 1988 she became an original cast member on the seven network series "Home and Away", as retired carnival entertainer and tarot reader Floss McPhee, until 1990, and was one of 16 original characters but has returned in numerous guest appearances reprising the role, the most recent in 2008. Tim Kennelly (6 July 1954 – 6 December 2005) was Irish Gaelic footballer.  His league and championship career with the Kerry senior team spanned ten years from 1974 to 1984.
Answer: 1 July 1981