id	keyword
american_scientific_journal-2778	vocabulary
american_scientific_journal-2778	language
american_scientific_journal-2778	words
american_scientific_journal-2778	learning
american_scientific_journal-2778	teaching
american_scientific_journal-2778	english
american_scientific_journal-2778	questionnaire
american_scientific_journal-2778	meaning
american_scientific_journal-2778	research