1175
While agents to improve cognitive function in the past focused on inverse agonists , which are negative allosteric modulators at GABA ( A ) alpha 5 receptors , research supporting that approach used only young animals and predated current evidence for excessive hippocampal activity in age - related conditions of cognitive impairment .
 Chemical: GABA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: GABA