(adapts to differing widths in a table. assumes spaces are used as field
separator. looks only at one row.)

function adaptColMarkings(text1, text2, rowMarking, colMarkings)
  row1 = text1.getRow(rowMarking)
  row2 = text2.getRow(rowMarking)
  cols1 = findColumns(row1)
  cols2 = findColumns(row2)
  newColMarkings = []
  for colMarking in colMarkings:
    idx = cols1.indexOf(colMarking)
    col2 = cols2.get(idx)
    add col2 to newColMarkings with label of colMarking
  end
  return newColMarkings
end