#April__Apr  the month following March and preceding May
  supertype:  #Gregorian_calendar_month  a month in the Gregorian calendar
  part of:  #Gregorian_calendar  #springtime
  part:  #April_Fools'_day__April_Fools'__All_Fools'_day  April 1; celebrated by playing of practical jokes
  part:  #Pan_American_Day__April_14  a day celebrating political and economic unity among American countries
  part:  #Patriot's_Day  the 3rd Monday in April; Massachusetts and Maine celebrate the battle of Lexington and Concord in 1775
  part:  #mid-April  the middle part of April

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