1978
Their pale underside can accumulate a yellowish diatom coat , The blue whale ’s two blowholes ( the analogue of human nostrils ) create a tall , columnar spray , which can be seen 30 – 40 " ft ( 9 – 12 " m ) above the water ’s surface .
 plant: diatom
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 plant: diatom