TODO_proper_sents

monotranslate mnoo dta generation for sent-based lm

now runs out of mem and does not process the whole megalong line

possible solution:
https://stackoverflow.com/questions/1251999/how-can-i-replace-a-newline-n-using-sed

...use empty lines as sent separators, and replace just the newlines that are not empty lines

(or do that in Perl or so...)