12350
A group of shareholders filed suit against Imperial Corp. of America , Drexel Burnham Lambert Inc. , First Executive Corp. and others , charging them with artificially inflating Imperial 's stock price to protect certain major investors .
 Imperial Corp. of America, Drexel Burnham Lambert Inc., First Executive Corp., Imperial
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 Imperial Corp. of America, Drexel Burnham Lambert Inc., First Executive Corp., Imperial