The problem was that while they were well documented at some sites, usually the ones with the very nice animals, there was also a large number of them where it was very vague -- there wasn't a lot of description or detail.
문제는, 주로 멋진 동물들이 그려져 있는 유적지들은 자세한 기록이 남아 있었지만, 대다수의 모호한 벽화의 경우에는 그에 대한 설명이나 상세한 내용이 많지 않았습니다.