av ante ▁people ▁have ▁been ▁studied ▁in ▁eth n ograph ies ; ▁in ▁ 2 0 1 0 ▁and ▁ 2 0 1 1 , ▁dem ographic ▁information ▁and ▁eth n ographic ▁details ▁were ▁research ed ▁for ▁the ▁context ▁of ▁health ▁among ▁the ▁X av ante ▁by ▁B asta , ▁and ▁t uber cul osis ▁specifically ▁being ▁exam ined ▁alongside ▁eth n ographic ▁information ▁by ▁De S ou za . ▁Contempor ary ▁X av ante ▁research ▁by ▁L ec ena ▁and ▁colle agues ▁in ▁ 2 0 1 6 ▁and ▁Da ▁Silva ▁in ▁ 1 9 9 9 ▁has ▁also ▁investig ated ▁in activity ▁and ▁so cio e conom ic ▁status ▁in ▁the ▁region ▁and ▁general ▁information ▁regarding ▁the ▁ways ▁that ▁X av ante ▁people ▁were ▁living ▁in ▁the ▁late ▁ 2 0 th ▁and ▁early ▁ 2 1 st ▁century . ▁ ▁X av ante ▁in ▁L ingu istics ▁The ▁X av ante ▁language ▁was ▁first ▁referenced ▁in ▁the ▁ 1 9 th ▁century , ▁in ▁works ▁of ▁compar ative ▁phil ology ▁which ▁used ▁word ▁lists ▁from ▁the ▁language ▁and ▁over views ▁of ▁its ▁structure . ▁In ▁the ▁ 2 0 th ▁century , ▁X av ante ▁has ▁been ▁studied ▁academ ically ▁since ▁the ▁ 1 9 6 0 s ▁by ▁both ▁Brazil ian ▁and ▁foreign ▁lingu ists , ▁starting ▁with ▁a ▁grammar ; ▁papers ▁from ▁this ▁period ▁exam ined ▁the ▁language ’ s ▁ph on emes , ▁sy ll able ▁structure , ▁as ▁well ▁as ▁aspect ▁and ▁ac quisition . ▁By