Extract the dates from the following paragraph: "The 20th (twentieth) century began on January 1, 1901 (MCMI), and ended on December 31, 2000 (MM).[1] The 20th century was dominated by significant events that defined the modern era: sixth mass extinction, Spanish flu pandemic, World War I and World War II, nuclear weapons, nuclear power and space exploration, nationalism and decolonization, the Cold War and post-Cold War conflicts, and technological advances. These reshaped the political and social structure of the globe."
user
Here are the dates extracted from the paragraph, presented in various formats:

**Verbatim**
- January 1, 1901 (MCMI)
- December 31, 2000 (MM)

**Full date**
- January 1, 1901
- December 31, 2000

**All-numeric (MM/DD/YYYY)**
- 01/01/1901
- 12/31/2000

**All-numeric (DD/MM/YYYY)**
- 01/01/1901
- 31/12/2000

It should be noted that both variants of the all-numeric notation are often shortened to include only the last two digits for the year instead of four, however, considering that the leading digits for representing the year in this paragraph vary from one another, doing so might be inappropriate, as it can lead to the loss of significant information.

Lastly, here are the standalone extractions of year notations represented with Roman numerals:
- MCMI
- MM

Standalone, they are not dates, per se, but they can be combined with a day and a month to become one.
assistant
Can you reformat the dates as YYYYMMDD?
user
Sure, here are the dates reformatted as YYYYMMDD:

19010101
20001231
assistant
Ok, now reformat putting a backslash between year, month and day
user