!! +var+ +exec+ +string+
tit:select
type:$type_both
syntax:!select ``data'' where ``condition''
mean:Outputs rows of a matrix ``data'', according to ``condition''. \
  Rows of the matrix can be separated either by new lines or by semi-colon ``;''. <p>\
  The condition can use words ``column 1'', ``column 2'', etc. to\
  designate comma-separated columns in each row.\
  </p>
