If there is a clear delimiter between the 2 pieces of data in the merged column you could split them out with a couple of formulas.
if merged data is data1 data200 in cell A1
the to get the left bit use =LEFT(A1,FIND(” “,A1)) in cell b1 in this example
to get the right bit use =RIGHT(A1,LEN(A1)-LEN(B1)) in cell c1 in this example
note the formula for the right bit uses the result from the right bit so need them both also the space in the quotes in the left bit is your delimiter.
Does this help? If not post a sample line from your export