(: Name: combiningnodeseqintersecthc1 :)
(: Description: Simple combination of node sequences involving different node sequences that results in empty sequence .  Use "intersect" operator. :)
(: Uses the count function to avoid the empty file for results. :)

count((<a>0</a>,<a>1</a>) intersect (<a>3</a>,<a>4</a>))