Any text is in this document.
But I'm only interested in the text between a beginning and an end tag.
BEGIN_TAG_110
In this text I'm interested in.
It can consist of several lines. Until the end tag.
END_TAG and any other things I'm not interested in until the next beginning tag starts.
Any other text.
BEGIN_TAG_237
I need this text.
END_TAG
More text ...

##</code><code>##

# BEGIN_TAG_110:
# In this text I'm interested in.
# It can consist of several lines. Until the end tag.
#
# BEGIN_TAG 237:
# I need this text.