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However , all its passageways " had become blocked by a solidified mass of rubble , small stones and rubbish which had been carried into the tomb by floodwaters " and it was not until the 1903 – 1904 excavation season that Howard Carter , after two previous seasons of strenuous work , was able to clear its corridors and enter its double burial chamber .
 Howard Carter
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Howard Carter