question: How can symptoms be prevented ?
answer: by avoiding triggers , such as allergens and irritants , and by the use of inhaled corticosteroids
turker_answer: Symptoms be prevented by avoiding triggers , such as allergens and irritants , and by the use of inhaled corticosteroids .
rule-based: Symptoms can be prevented by avoiding triggers , such as allergens and irritants , and by the use of inhaled corticosteroids .