Some context: Sutcliffe was born in Bingley in the West Riding of Yorkshire to a working-class family. He was given a Catholic upbringing by his parents, John William Sutcliffe and his wife Kathleen Frances (nee Coonan). Reportedly a loner, he left school aged fifteen and had a series of menial jobs, including two stints as a gravedigger in the 1960s. Between November 1971 and April 1973, Sutcliffe worked at the Baird Television factory on a packaging line.
West Yorkshire Police were criticised for being inadequately prepared for an investigation on this scale. It was one of the largest investigations by a British police force and predated the use of computers. Information on suspects was stored on handwritten index cards. Aside from difficulties in storing and accessing the paperwork (the floor of the incident room was reinforced to cope with the weight of the paper), it was difficult for officers to overcome the information overload of such a large manual system. Sutcliffe was interviewed nine times, but all information the police had about the case was stored in paper form, making cross-referencing difficult, compounded by television appeals for information which generated thousands more documents. Assistant Chief Constable George Oldfield was criticised for being too focused on a hoax confessional tape that seemed to indicate a perpetrator with a Wearside background, and for ignoring advice from survivors of Sutcliffe's attacks, and several eminent specialists including the FBI, plus dialect analysts such as Stanley Ellis and Jack Windsor Lewis, whom he had also consulted throughout the manhunt, that "Wearside Jack" was a blatant hoaxer. The investigation used it as a point of elimination rather than a line of enquiry and allowed Sutcliffe to avoid scrutiny, as he did not fit the profile of the sender of the tape or letters. The "Wearside Jack" hoaxer was given unusual credibility when analysis of saliva on the envelopes he sent showed he had the same blood group as the Yorkshire Ripper had left at crime scenes, a type shared by only 6% of the population. The hoaxer appeared to know details of the murders which had not been released to the press, but which in fact he had acquired from his local newspaper and pub gossip. The official response to the criticisms led to the implementation of the forerunner of the Home Office Large Major Enquiry System, the development of the Major Incident Computer Application (MICA), developed between West Yorkshire Police and ISIS Computer Services. In response to the police reaction to the murders, the Leeds Revolutionary Feminist Group organised a number of 'Reclaim the Night' marches. The group and other feminists had criticised the police for victim-blaming, especially the suggestion that women should remain indoors at night. Eleven marches in various towns across the United Kingdom took place on the night of 12 November 1977. They made the point that women should be able to walk anywhere without restriction and that they should not be blamed for men's violence. In 1988, the mother of Sutcliffe's last victim, Jacqueline Hill, during action for damages on behalf of her daughter's estate, argued in the High Court that the police had failed to use reasonable care in apprehending the murderer of her daughter in Hill v Chief Constable of West Yorkshire. The House of Lords held that the Chief Constable of West Yorkshire did not owe a duty of care to the victim due to the lack of proximity and therefore failing on the second limb of the Caparo test.
What does this mean for the police
A: compounded by television appeals for information which generated thousands more documents.

Some context: ABBA (Swedish pronunciation: [2ab:a]) were a Swedish pop group, formed in Stockholm in 1972 by Agnetha Faltskog, Bjorn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad: the group name derives from the first letter in each of their names. They became one of the most commercially successful acts in the history of popular music, topping the charts worldwide from 1974 to 1982. ABBA won the Eurovision Song Contest 1974 at The Dome in Brighton, UK, giving Sweden its first triumph in the contest. They are the most successful group to have taken part in the competition.
As the group entered the Melodifestivalen with "Ring Ring" but failed to qualify as the 1973 Swedish entry, Stig Anderson immediately started planning for the 1974 contest. Ulvaeus, Andersson and Stig Anderson believed in the possibilities of using the Eurovision Song Contest as a way to make the music business aware of them as songwriters, as well as the band itself. In late 1973, they were invited by Swedish television to contribute a song for the Melodifestivalen 1974 and from a number of new songs, the upbeat song "Waterloo" was chosen; the group was now inspired by the growing glam rock scene in England. ABBA won their national heats on Swedish television on 9 February 1974, and with this third attempt were far more experienced and better prepared for the Eurovision Song Contest. Winning the 1974 Contest on 6 April 1974 gave ABBA the chance to tour Europe and perform on major television shows; thus the band saw the "Waterloo" single chart in many European countries. "Waterloo" was ABBA's first number-one single in big markets such as the UK and West Germany. In the United States, the song peaked at number-six on the Billboard Hot 100 chart, paving the way for their first album and their first trip as a group there. Albeit a short promotional visit, it included their first performance on American television, The Mike Douglas Show. The album Waterloo only peaked at number 145 on the Billboard 200 chart, but received unanimous high praise from the US critics: Los Angeles Times called it "a compelling and fascinating debut album that captures the spirit of mainstream pop quite effectively ... an immensely enjoyable and pleasant project", while Creem characterised it as "a perfect blend of exceptional, lovable compositions". ABBA's follow-up single, "Honey, Honey", peaked at number 27 on the US Billboard Hot 100, and was a number-two hit in West Germany. However, in the United Kingdom, ABBA's British record label, Epic, decided to re-release a remixed version of "Ring Ring" instead of "Honey, Honey", and a cover version of the latter by Sweet Dreams peaked at number 10. Both records debuted on the UK chart within one week of each other. "Ring Ring" failed to reach the Top 30 in the United Kingdom, increasing growing speculation that the group was simply a Eurovision one-hit wonder.
Did ABBA win the contest?
A:
they were invited by Swedish television to contribute a song for the Melodifestivalen 1974 and from a number of new songs,