user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'Isotopes' regarding 'Bohrium'
Table Content:
| Isotope | Half-life | Decay mode | Discovery year | Reaction |
| --- | --- | --- | --- | --- |
| 260Bh | 35 ms | α | 2007 | 209Bi(52Cr,n) |
| 261Bh | 11.8 ms | α | 1986 | 209Bi(54Cr,2n) |
| 262Bh | 84 ms | α | 1981 | 209Bi(54Cr,n) |
| 262mBh | 9.6 ms | α | 1981 | 209Bi(54Cr,n) |
| 264Bh | 0.97 s | α | 1994 | 272Rg(—,2α) |
| 265Bh | 0.9 s | α | 2004 | 243Am(26Mg,4n) |
| 266Bh | 0.9 s | α | 2000 | 249Bk(22Ne,5n) |
| 267Bh | 17 s | α | 2000 | 249Bk(22Ne,4n) |
| 270Bh | 61 s | α | 2006 | 282Nh(—,3α) |
| 271Bh | 1.2 s | α | 2003 | 287Mc(—,4α) |
| 272Bh | 9.8 s | α | 2005 | 288Mc(—,4α) |
| 274Bh | 40 s | α | 2009 | 294Ts(—,5α) |
| 278Bh | 11.5 min? | SF | 1998? | 290Fl(e−,νe3α)? |


Question
What are the half-lives of the Bohrium isotopes ²⁷⁰Bh and ²⁷⁴Bh?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["The Bohrium isotopes ²⁷⁰Bh and ²⁷⁴Bh have an half-lives of about 61 s and 40 s."]