one sentence

So I'm trying to figure out how to set up wills for Val and myself but in reading one, I was completely befuddled, and duly impressed, by this sentence. Partly because it was confusing, and largely because it is a single sentence. Yes, only the one period.

If my _________________ (Spouse), ___________________________________, shall survive me, I give, devise and bequeath to my ___________ (Spouse) cash, securities or other property of my estate (undiminished by any estate, inheritance, succession, death or similar taxes) having a value equal to the maximum marital deduction as finally determined in my federal estate tax proceedings, less the aggregate amount of marital deductions, if any, allowed for such tax purposes by reason of property or interests in property passing or which have passed to my ______________________ (Spouse) otherwise than pursuant to the provisions of this Article; provided, however, the amount of this bequest shall be reduced by the amount, if any, needed to increase my taxable estate (for federal estate tax purposes) to the largest amount that, after allowing for the unified credit against the federal estate tax, and the state death tax credit against such tax (but only to the extent that the use of such state death tax credit does not increase the death tax payable to any state), will not result in a federal estate tax being imposed on my estate.

Oh and that was on page 2. Of 11. I'm seriously considering paying $40 for software that will make the will for me now.