#strainer  a filter to retain larger pieces while smaller pieces and liquids pass through
  supertype:  #filter  device that removes something from whatever passes through it
  subtype:  #colander__cullender  bowl-shaped strainer; used to wash or drain foods
  subtype:  #sieve__screen  a strainer for separating lumps from powdered material or grading particles
     subtype:  #riddle  a coarse sieve (as for gravel)
     subtype:  #sifter  a household sieve (as for flour)
  subtype:  #tea-strainer__teastrainer  a device to keep back tea leaves when pouring a cup of tea

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