In the following code

```
\documentclass{report}
\usepackage{tikz}
\usepackage{fontspec}%requires xelatex                                                                                                                                                                      
\usepackage{lipsum}
\thispagestyle{empty}
\begin{document}
\begin{tikzpicture}
  \node(a)[align=center]{\Large \textbf{Introduction}};
  \node(b)[align=left, text width=10cm] at (a.south)[anchor=north]{\lipsum[1]};
  \node(b)[align=right, text width=10cm] at (b.south)[anchor=north]{\textbf{Rīga, August 19, 2017}};
\end{tikzpicture}
\end{document}

```

which gives the output

[![enter image description here](https://i.stack.imgur.com/XmA3e.png)](https://i.stack.imgur.com/XmA3e.png)

I am forced to use separate `\nodes` `a`, `b` and `c` because a different text alignment is used in each of them. 

Can I merge `\nodes` `a`, `b` and `c` into a single node that has multiple text alignment modes?