According to this article, what type of cats cannot purr? 

On an extremely rare occasion, a mountain lion or a bobcat might still be spotted by a visitor in one of our county parks. Both these wild felines can make a variety of household cat sounds. Baby mountain lions (also called pumas and cougars in different parts of the country) and baby bobcats meow like household kittens. As adults, they growl, hiss and spit when they are displeased. When they are contented, they purr.

Of course a full-grown mountain lion purrs about twenty times louder than that friendly puss who sleeps most of the afternoon at the foot of your bed. Not all kinds of cats can purr. Cats that can roar -- such as tigers, jaguars and African lions -- can not purr. And cats that can purr --such as cougars, bobcats and household tabbies -- can not roar. Until recently, exactly how purring cats managed to purr was a mystery. If you try to purr continuously like a mountain lion or bobcat, you'll quickly discover its impossible for you to do.
system
is lekh ke anusaar, kis prakaar kii billiyaan shuddh nahin kar sakati hai?

ek atyant durlabh avasar par, ek pahari sher yaa ek bobacat ko abhi bhi hamaare ek county parkon main ek aagatuk dwaara dekha ja saktaa he.ye donon junglee felin vibhinn prakaar ke gharelu billi kii awaz kar sakate hai.baby mountain liance (jise desh ke vibhinn hisson main pums or kaugar bhi kaha jaataa he) or baby bobakats myaou kii tarah gharelu billi ke bachche kii tarah.vayaskon ke rup main, ve naaraaz hone par badhate hai, phufakaarte hai or thookte hai.jab ve santusht hote hai, to ve shuddh hote hai.

beshak ek purna viksit parvat sher us dostana pus kii tulana main lagbhag bees guna jor se he jo aapke bistar ke pair main dopaher ke adhikansh samay sota he.sabhi prakaar kii billiyaan nahin kar sakati hai.billiyaan jo garjana kar sakati hai - jaise ki baagh, jaguaar or africa sher - shuddh nahin kar sakate.or billiyaan jo ki kugars, bobakats or gharelu tabbes ke rup main pyor kar sakati hai -garjan nahin kar sakati.kuch samay pehle tak, vastav main billiyon ko kaise shuddh karne main kaamyaab rahaa, ek rahasy tha.yadi aap ek pahari sher yaa bobacat kii tarah lagaataar shuddh karne kii koshish karte hai, to aap jaldi se aapke liye asambhav kii khoj karenge.
user
africa sher, jaguaar or baagh jaise garjana karne vaali billiyaan, shuddh nahin kar sakati hai.
assistant
<|system|>
</s>
<|user|>
is lekh ke anusaar, kis prakaar kii billiyaan shuddh nahin kar sakati hai?

ek atyant durlabh avasar par, ek pahari sher yaa ek bobacat ko abhi bhi hamaare ek county parkon main ek aagatuk dwaara dekha ja saktaa he.ye donon junglee felin vibhinn prakaar ke gharelu billi kii awaz kar sakate hai.baby mountain liance (jise desh ke vibhinn hisson main pums or kaugar bhi kaha jaataa he) or baby bobakats myaou kii tarah gharelu billi ke bachche kii tarah.vayaskon ke rup main, ve naaraaz hone par badhate hai, phufakaarte hai or thookte hai.jab ve santusht hote hai, to ve shuddh hote hai.

beshak ek purna viksit parvat sher us dostana pus kii tulana main lagbhag bees guna jor se he jo aapke bistar ke pair main dopaher ke adhikansh samay sota he.sabhi prakaar kii billiyaan nahin kar sakati hai.billiyaan jo garjana kar sakati hai - jaise ki baagh, jaguaar or africa sher - shuddh nahin kar sakate.or billiyaan jo ki kugars, bobakats or gharelu tabbes ke rup main pyor kar sakati hai -garjan nahin kar sakati.kuch samay pehle tak, vastav main billiyon ko kaise shuddh karne main kaamyaab rahaa, ek rahasy tha.yadi aap ek pahari sher yaa bobacat kii tarah lagaataar shuddh karne kii koshish karte hai, to aap jaldi se aapke liye asambhav kii khoj karenge.</s>
<|assistant|>
africa sher, jaguaar or baagh jaise garjana karne vaali billiyaan, shuddh nahin kar sakati hai.</s>
