[TYPO3] TS variables and string concatenation

[Brian Bendtsen]

Hi

I have an area on my website for the page title.

lib.HeadLine = TEXT
lib.HeadLine.data = page : title

I would like to show the title of the current page and the page in the 
upper level, something like this:

upperLevelPageTitle - thisPageTitle

To get the upper level I use this:

titlelevel : -2

How do I concatenate these objects?

I have tried playing with variables:

$firstHeader = titlelevel : -2
$secondHeader = page : title
lib.HeadLine = TEXT
lib.HeadLine.data = {$firstHeader} - {$secondHeader}

but the output is just {$firstHeader} - {$secondHeader}

Any help would be appreciated.

/Brian Bendtsen