id	keyword
abc-3306	species
abc-3306	vegetation
abc-3306	arenastri
abc-3306	polygonetum
abc-3306	annuae
abc-3306	bulgaria
abc-3306	association
abc-3306	et al
abc-3306	polygono
abc-3306	class
abc-3306	communities
abc-3306	agg
abc-3306	areas
abc-3306	composition
abc-3306	polygonetum arenastri