59819
It is jointly owned by the state oil firm Ecopetrol , and U.S. company Occidental Petroleum .
 Ecopetrol, U.S., Occidental Petroleum
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:
 Ecopetrol, U.S., Occidental Petroleum