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    Even so, unstructured data makes up most of the information in the world today.

                     The three most common forms of unstructured data are images, audio and text.
                     Each form is gathered and used in different ways, as shown in the table below:

                        Type             Common Examples                                How It Is Used?

                        Audio       Voice recordings, songs,               Voice  assistants  like Siri or Alexa
                                    podcasts, phone calls                  understand  spoken  words. Music

                                                                           apps can identify a song from a few
                                                                           seconds of sound.

                       Images       Photographs, X-rays,                   Doctors  use  AI to  check  X-rays for

                                    drawings, satellite pictures           signs  of illness. Plant  identification
                                                                           apps use photos to name flowers.

                         Text       Stories, emails, chat                  Chatbots  read  text  to  understand
                                    messages, news articles                questions.  AI tools  can  summarise
                                                                           a long article  into  a few short

                                                                           sentences.

                     AI systems are being trained to handle all three types of unstructured data. For

                     example, when a voice assistant understands what you are saying, it is processing
                     audio data. When a photo app tells you the name of the bird sitting on your windowsill,
                     it is processing image data. These amazing abilities depend on huge amounts of

                     carefully collected data.

                                       In a class of 30 students, 15 prefer math, 10 prefer science, and 5 like both. How
                                       many students like either math or science, but not both?

                                              a)  10 students                            b)  15 students

                                              c)  20 students                            d)  25 students

                                                                                          Good Data and Bad Data      25

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