I want to know the answer to the following question:
How many people attended the service in Lviv?
All the background I'm provided with is that "On February 26, 1989, between 20,000 and 30,000 people participated in an unsanctioned ecumenical memorial service in Lviv, marking the anniversary of the death of 19th Century Ukrainian artist and nationalist Taras Shevchenko.". Is that enough to answer the question?
Answer: yes