id	keyword
american_scientific_journal-2438	grade
american_scientific_journal-2438	volume
american_scientific_journal-2438	children
american_scientific_journal-2438	conservation
american_scientific_journal-2438	development
american_scientific_journal-2438	ability
american_scientific_journal-2438	study
american_scientific_journal-2438	research
american_scientific_journal-2438	psychology