Context: In 1996, a surrogate character mechanism was implemented in Unicode 2.0, so that Unicode was no longer restricted to 16 bits. This increased the Unicode codespace to over a million code points, which allowed for the encoding of many historic scripts (e.g., Egyptian Hieroglyphs) and thousands of rarely used or obsolete characters that had not been anticipated as needing encoding. Among the characters not originally intended for Unicode are rarely used Kanji or Chinese characters, many of which are part of personal and place names, making them rarely used, but much more essential than envisioned in the original architecture of Unicode.

Question: When was a surrogate character mechanism implemented in Unicode 2.0?
Answer: 1996

Question: Why was a surrogate character mechanism implemented?
Answer: so that Unicode was no longer restricted to 16 bits

Question: What are some characters not originally intended for Unicode? 
Answer: rarely used Kanji or Chinese characters

Question: Why are some foreign characters rarely used? 
Answer: many of which are part of personal and place names

Question: Why was the Unicode 2.0 codespace increased? 
Answer: allowed for the encoding of many historic scripts

Question: When was Unicode restricted to 16 bits?
Answer: Unanswerable

Question: What types of egyptian hieroglyphs are rarely used?
Answer: Unanswerable

Question: What are the extra Unicode characters called?
Answer: Unanswerable

Question: What types of characters were removed with Unicode 2.0?
Answer: Unanswerable

Question: What was removed in 1996?
Answer: Unanswerable