...
SECTION$(Document$, PageHeader$, PageEnd$, [AddLines%=>0])
Arguments
Document$ is a string containing the source document.
PageHeader$ is a sub string of Document$ which indicates the first line of the section.
PageEnd$ is a sub string of Document$ that indicates the end of the section.
The result starts with the first line of Document$ containing PageHeader$ and ends with the line just before the line containing PageEnd$.
AddLines% is an optional value, containing the number of lines to be added at the end of the section. E.g. when AddLines%=1 , also the line containing PageEnd$ is included.
...
"Turning and turning in the widening gyre
The falcon cannot hear the falconer;
Things fall apart; the centre cannot hold;
Mere anarchy is loosed upon the world
The blood-dimmed tide is loosed, and everywhere
The ceremony of innocence is drowned;
The best lack all conviction, while the worst
Are full of passionate intensity"
then
SECTION$(Document$, "fall apart", "ceremony")
returns
"Things fall apart; the centre cannot hold;
Mere anarchy is loosed upon the world
The blood-dimmed tide is loosed, and everywhere
"
SECTION$(Document$, "fall apart", "Ceremony")
...