Switch statement

[Bill]

 switch (Text) contains
    case "ballast"
      put "no cargo" into fld "e4"
      break
    case "bulk"
      put "oil bunkers" into fld "e5"
      break
    default
      put "general cargo" into fld "e6"
  end switch

The above is a simple switch where (Text) is more than one word and I am
looking to see if that list of words contains one particular word. I have
tried every possible permutation of this and can't find the simple answer.
Maybe I have to do like in MySQL and put ? Before and after my search word
although that is particular for MySQL.

What is the easiest way to do this (other than three separate if statements)
-- I would like to get the switch working with a "contains" search.