Context: Colour broadcasts started at similarly higher resolutions, first with the US NTSC color system in 1953, which was compatible with the earlier monochrome systems and therefore had the same 525 lines of resolution. European standards did not follow until the 1960s, when the PAL and SECAM color systems were added to the monochrome 625 line broadcasts.

Question: What year did color broadcasts start in the US?
Answer: 1953,

Question: How many lines of resolution did the US NTSC color system have in 1953?
Answer: 525

Question: When did Europe begin color broadcasts?
Answer: 1960s

Question: The PAL and SECAM were color systems where?
Answer: Europe

Question: How many lines of resolution were the European monochrome broadcasts?
Answer: 625

Question: What year did black and white broadcasts start in the US?
Answer: Unanswerable

Question: How many lines of resolution did the UK NTSC color system have in 1953?
Answer: Unanswerable

Question:  When did Asia begin color broadcasts?
Answer: Unanswerable

Question:  The PAL and SECAM were black and white systems where?
Answer: Unanswerable

Question: How many lines of resolution were the European color broadcasts?
Answer: Unanswerable