..which can make a sentence into two equal part or half or partially half
Others have answered you well, but what got my attention was the two equal part or half "wordings", in your question. Though I might be wrong, in the sense that the OP's example might have shown what s/he might want.
But that being said, IMHO, one can get the sentence into two equals, considering all the character in the sentence space in inclusive, like so:
my $wd =
'Perl 5 is a highly capable, feature-rich programming language with ov
+er 27 years of development.';
my $midpt = ( split //, $wd ) / 2 ;
$/ => (
"First-Half:", substr( $wd, 0, $midpt ),
"Second-Half:", substr( $wd, $midpt )
Perl 5 is a highly capable, feature-rich program
ming language with over 27 years of development.
If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me