Extract dates from dataframe

Hi,

I have the following dataframe:
? ID ? ? ? ? ? ? ? ? ? ? ? ? ? ?Dates
?1 ? ? ? ? ? ? ? 16-07-01 ?06-10-95
?2 ? ? ? ? ? ?24/01/02 ? ? 06-10-95
?3 16/01/02 ? 16/08/94 ? ? 12/01/91

And I would like to extract the dates, but couple the ID's to the right
dates, eg:
ID ?Dates
1 ? ?16-07-01
1 ? ?06-10-95
2 ? ?24-01-02
2 ?....

I have no clue about how to get started, looks something for the
regexp/grep/... kind of functions, but I don't get the point.

Any thoughts??

Kind regards

Bart Joosen

PS: for the reconstruction of the dataframe:
dat <-
structure(list(ID = c(1, 2, 3), Dates = structure(c(2L, 4L, 6L
), .Label = c("16-01-02 ? 16-08-94", "16-07-01 ?06-10-95", "24-01-02
06-10-95",
"24/01/02 ? ? 06-10-95", "16/01/02 ? 16/08/94", "16/01/02 ? 16/08/94
12/01/91"
), class = "factor")), .Names = c("ID", "Dates"), row.names = c(NA,
3L), class = "data.frame")


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