You can use lists: See the answers here for creating a list with custom separator to use in foreach loop (You need it to have the possibility of adding a comma in your sentance)
I will provide a code using @HeikoOberdiek's answer of the above link:
\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{pgffor}
\usepackage{etoolbox}
\usepackage{etexcmds}
\DeclareListParser*{\forvertlist}{|}
\makeatletter
\newcommand{\vertocomma}[2]{%
\let#1\@empty
\forvertlist{\@verttocomma{#1}}{#2}%
}
\newcommand{\@verttocomma}[2]{%
\edef#1{%
\ifx#1\@empty
\else
\etex@unexpanded\expandafter{#1},%
\fi
{\etex@unexpanded{#2}}%
}%
}
\makeatother
\newcounter{ii}
\vertocomma\mylist{sentenceA|| One big sentence to see if it works with the section and if it breaks lines..|se,nt,en,ce,B| sentenceC | }
\foreach \x in \mylist {%
\stepcounter{ii}%
%\typeout{[\meaning\x]}%
\global\expandafter\let\csname myObj\arabic{ii}\endcsname\x%
}
\usepackage{titlesec}
\titleformat{\section}[display]
{\normalfont\bfseries}
{Item \arabic{section}:\space \csname myObj\arabic{section}\endcsname}{0pt}{}
\begin{document}
\setcounter{ii}{0}
\begin{enumerate}
\foreach \x in \mylist
{\stepcounter{ii}
\item\label{it:\arabic{ii}} \x
}
\end{enumerate}
\section{}
This item is the \ref{it:\arabic{section}} item and ends with a full-stop.\csname myObj1\endcsname
\section{}
The item \ref{it:2} is a sentence with many commas
\end{document}
You can chose the way to make the list or copy and use this one.
The result is:

(Edit: You can use 'nameref' too inside your subsections (I think it will work) if you don't like the titleformat command.)
Good Luck (The sections can be formated as you wish or be empty like mine)