libqtgui4 : Depends: libpng12-0 (>= 1.2.13-4) but it is not installed
$ wget http://mirrors.kernel.org/ubuntu/pool/main/libp/libpng/libpng12-0_1.2.54-1ubuntu1_amd64.deb
$ sudo dpkg -i libpng12-0_1.2.54-1ubuntu1_amd64.deb
libqtgui4 : Depends: libpng12-0 (>= 1.2.13-4) but it is not installed
$ wget http://mirrors.kernel.org/ubuntu/pool/main/libp/libpng/libpng12-0_1.2.54-1ubuntu1_amd64.deb
$ sudo dpkg -i libpng12-0_1.2.54-1ubuntu1_amd64.deb
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