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Niwy Ostrołęckie
Niwy
Ostrołęckie
is a
village
in the
administrative district
of
Gmina Warka
, within
Grójec County, Masovian Voivodeship
, in east-central
Poland
. It
lies
approximately
north-east
of
Warka
,
east
of
Grójec
, and
south
of
Warsaw
.
The village
has a population of
100
.