The provided file consists of 5 PostScript documents, shuffled together but not rearranged. Pulling out the postscript to create the provided images leaves the postscript for the answer.
The four postscript files to produce each of the four pictures are:
%!
/check 0 def
check 0 eq {72 dup scale 8.5 2 div 11 2 div translate .25 dup scale /check 1 def} if
5 72 div setlinewidth
90 rotate
3 0 moveto
2 0 1 0 360 arc
1 0 moveto
-1 0 lineto
0.5 2 moveto
0.5 -2 lineto
-3 2 moveto
-1 0 lineto
-3 -2 lineto
stroke 0 0 moveto
showpage /check 0 def
%!
/check 0 def
check 0 eq {72 dup scale 8.5 2 div 11 2 div translate .25 dup scale /check 1 def} if
5 72 div setlinewidth
gsave
-3.5 dup translate
1 2 div setlinewidth
0.7 setgray
8 {
0 0 moveto
7 0 lineto
stroke 0 0 moveto
0 1 translate
} repeat
grestore 0 0 moveto
7 {
0 setgray
0 0 moveto
3 0 lineto
360 14 div rotate
1 0 lineto
closepath fill 0 0 moveto
0 1 1 sethsbcolor
0 0 moveto
1 0 lineto
360 14 div rotate
3 0 lineto
closepath fill 0 0 moveto
} repeat
showpage /check 0 def
%!
/check 0 def
check 0 eq {72 dup scale 8.5 2 div 11 2 div translate .25 dup scale /check 1 def} if
5 72 div setlinewidth
0 1 1 sethsbcolor
5 {
gsave
1 0.5 scale
2.5 0 moveto 1.5 0 1 0 360 arc fill 0 0 moveto
grestore 0 0 moveto
gsave
0 setgray
0 0 moveto
0.75 0 lineto
1 0 .25 180 90 arcn
1 0 .25 90 270 arc
stroke 0 0 moveto
grestore 0 0 moveto
currenthsbcolor 3 2 roll 1 5 div add 3 1 roll sethsbcolor
360 5 div rotate
} repeat
showpage /check 0 def
%!
/check 0 def
check 0 eq {72 dup scale 8.5 2 div 11 2 div translate .25 dup scale /check 1 def} if
5 72 div setlinewidth
0 1 .75 sethsbcolor
4 {
-1.25 0.5 moveto
-1.25 3 lineto
1.25 3 lineto
1.25 0.5 lineto
-1.25 0.5 lineto
stroke 0 0 moveto
currenthsbcolor 3 2 roll 1 8 div add 3 1 roll sethsbcolor
1.25 3 moveto
3 1.25 lineto
1.25 -0.5 lineto
-0.5 1.25 lineto
1.25 3 lineto
stroke 0 0 moveto
currenthsbcolor 3 2 roll 1 8 div add 3 1 roll sethsbcolor
360 4 div rotate
} repeat
showpage /check 0 def
The file for the final answer is
%!
/check 0 def
check 0 eq {72 dup scale 8.5 2 div 11 2 div translate .25 dup scale /check 1 def} if
5 72 div setlinewidth
3 {
5 6 div 1 .75 sethsbcolor
2 {
0 0 moveto 2 0 1 -120 120 arc closepath
fill 0 0 moveto
360 2 div rotate
} repeat
1 3 div 1 1 sethsbcolor
360 9 div -0.5 mul rotate
3 {
0 0 moveto
2 0 lineto
stroke 0 0 moveto
360 9 div 5 mul rotate
} repeat
360 9 div -2.5 mul rotate
} repeat
1 3 div 1 1 sethsbcolor
1 0 moveto 0 0 1 0 360 arc fill 0 0 moveto
5 6 div 1 .75 sethsbcolor
1 .2 2 { dup 0 moveto 0 0 3 2 roll 0 360 arc } for
stroke 0 0 moveto
showpage /check 0 def
And the image file that is the answer is:
The training for this puzzle is IKEBANA ("when I arrange them over that picture of a vase") whose solution is REMOVE THE BLUE. So the trained answer for this puzzle is a red-and-yellow flower:
Note that this is "removing the blue" in a painterly sense, not an RGB sense. This should be obvious because: a) printers are CMYK, not RGB, devices, and b) the colors specified in the postscript are HSB, not RGB.