Assertion: park's lake | /r/HasProperty | constructed on the site of former swamps
Facets:
Source sentences:
text: The park first opened for public use in the winter of 1859 when thousands of New Yorkers skated on lakes constructed on the site of former swamps.
text: The park first opened for public use in the winter of 1859 when thousands of New Yorkers skated on lakes constructed on the site of former swamps.