YEAH YOU KNOW WHAT'S STEEP AND WHAT'S SHALLOW IT'S TRICKY LET'S HAVE THAT FOR NOW THEN YOU IF IF WE CHANGE OUR MIND LATER WHEN WE GO THROUGH WE CAN ALWAYS COME BACK TO IT AND SAY UM AGAIN I'D SAY THIS THIS IS A PHYSICAL PROCESS NOT A SPECTRAL FEATURE UH YEAH RIGHT WHAT HAVE WE GOT DIFFERENT HERE UH I DON'T HAVE K. STAR BUT I SHOULD DO YEAH IT'S THAT ONE AND THIS ONE HERE OH WE WERE INCLUDING FEATURE WITHIN SPECTRAL FEATURE WAIT WHERE OKAY OKAY WHAT'S WRONG WITH BROAD H. ALPHA I THINK I JUST MISSED IT I THINK IT'S NOT AS IF IT'S A ALTHOUGH IT'S FOUR WIDTHS HALF MAXIMUM IT'S STILL THE S THE LINE WITHIN IT OKAY THAT WAS EASY SILICONE TWO IS AN ELEMENT RATHER THAN A IN THIS CONTEXT RATHER THAN A LINE THESE ARE THE LINES I GUESS WHAT YOU W IF WASN'T IN THERE THEN YOU'D HAVE IT SILICONE TWO LINES AT BUT WITHOUT WITH THE I THINK THAT MEANS SILICONE TWO DERIVED FROM THESE TWO FEATURES YEAH I THINK SO TOO IN THAT OKAY M THAT'S ACTUALLY AN IONIC SPECIES ISN'T IT ACTUALLY NOT A A SPECTRAL FEATURE AS SUCH O ON ITS OWN YEAH THAT'S TRUE LYMAN ALPHA FOREST CLOUDS LYMAN ALPHA FOREST YOU CAN POINT TO ON THE SPECTRUM THAT'S TRUE BUT LYMAN ALPHA FOREST CLOUDS ARE SOURCE TYPES WE AREN'T MARCHING MARKING SO WE HAVEN'T BASICALLY WE JUST HAVEN'T GOT A A RULE FOR SPECTRAL FEATURES WITHIN OR REFERRING TO S TYPES OF SOURCE WHEN WE'RE NOT BOTHER MARKING THE SOURCE BUT WE CAN JUST BE CONSISTENT AND I DON'T THINK WE ARE 'CAUSE THAT'S NOT A SPECTRAL FEATURE IN THE SPECTRUM WE'RE LOOKING AT YEAH LYMAN ALPHA FOREST IS DEFINED BY THE DEFINITION OF LYMAN ALPHA FOREST CLOUDS IS THAT THEY HAVE LYMAN ALPHA FORESTS BUT SAYING THAT ISN'T THE SAME AS SAYING WE'VE SEEN THAT IN A SPECTRUM WHEREAS A BROAD LINE QUASAR SOMEONE HAS LOOKED AT IT AND THEY'VE SEEN A BROAD LINE BUT SOMEONE'S L SOMEONE'S LOOKED AT THAT SPECTRUM B B WHY AREN'T YOU MARKING IT THEN BECAUSE THEY WEREN'T I DON'T KNOW I DON'T THINK WE WERE MAKING DIFFUSE DIFFUSE EMISSION OR YEAH UH-HUH UM I IT IT WOULDN'T COUNT AS A SOURCE TYPE OR WELL THAT'S P WHAT I'M P PONDERING REALLY UM HMM YEAH BUT THIS IS UM SPECIES OF CLOUD IT'S A P A PARTICULAR SPECIES OF CLOUD NOT JUST A GENERAL CLOUD ISN'T IT SO ISN'T THAT DIFFERENT IT'S A MODIFIER OF OF CLOUDS BUT I DON'T TH DON'T THINK IF WE'RE INCLUDING THE YEAH I THINK IF WE'RE NOT INCLUDING NEBULA AND CLOUDS WE CAN'T INCLUDE PERHAPS WE SHOULD'VE DONE BUT WE HAVEN'T FOR THE WHOLE THING SO I THINK MAYBE WE JUST NEED TO PUT UNDER DON'T INCLUDE DIFFUSE EMISSION HMM BUT THEN WE STILL HAVE TO DECIDE IF WE DON'T LABEL THE SOURCE WHAT DO WE DO ABOUT THE SPECTRAL FEATURES THAT DEFINE THAT SOURCE I IF WE HAVE FOR EXAMPLE BROAD ABSORPTION LINE OBJECT WE MARK THAT WE MARK BROAD ABSORPTION LINE IN THAT BUT THAT'S 'CAUSE WE'VE TO KNOW IT'S A RATHER BROAD ABSORP ABSORPTION LINE OBJECT WE HAVE SEEN IT UH AND BUT IT'S IN THIS S SP SP SP SP SPECTRUM OF ANOTHER OBJECT THOUGH IT IT ISN'T THE SPECTRUM OF THE CLOUDS YEAH BUT IT A SPECTRAL FEATURE IN THE QUASAR THE LYMAN ALPHA FOREST UH AND HE COULD POINT AT IT THAT'S TRUE AND SAY THAT IS LET'S KEEP THEM YEAH YEAH EVEN IF NOT MARKED NO ONE ELSE CAN READ THAT SORRY OKAY SO TH LYMAN ALPHA FOREST AGAIN YEP AND THAT DEFINITELY IS A SPECTRAL FEATURE ON ITS OWN THEN 'CAUSE IT DOESN'T EVEN SAY LYMAN ALPHA FOREST CLOUDS YEAH EACH HELIUM TWO OPTICAL DEPTH I THINK THAT'S ELEMENTAL SPECIES OH OH WE MARKED THE SAME LINES EXCELLENT WHAT HAVE WE DONE DIFFERENTLY 'CAUSE THE PROPERTY OF THE LINE THEY'RE GONNA WE'RE GONNA HAVE A LOT OF THESE AND WE WEREN'T USING LINE WHAT WAS THE ONE WE DIDN'T DO BEFORE LINE RATIO WE WEREN'T DOING 'CAUSE IT'S NOT TALKING ABOUT A SPECIFIC LINE YEAH SO YEAH I DON'T THINK THAT COUNTS FEATURE RIGHT UM SORRY CAN WE JUST GO BACK TH UH ONE PAGE DID DID YOU RESOLVE THE THE LI THE DIFFERENT UM SEGMENTATIONS LIKE UH THE MAIN PROBLEM WAS THERE'S ONLY ONE DIFFERENCE HERE OH SORRY I I THOUGHT IT WAS A PROBLEM OF LIKE UH ONE HAVING UNDERLINED THE ENTIRE OH SORRY NO NO I I SE OKAY SORRY YEAH I SEE QUITE IMPRESSIVELY THAT ONE'S THE SAME SYSTEMS UH YEAH THAT'S A MODIFIER OF DATA I CAN'T EVEN BUT IF YOU SAID I MEAN THAT'S THAT'S A DESCRIPTION OF THE TYPE OF DATA A D THE CONTINUUM'S SPET MM I REALLY DON'T THINK THAT COUNTS BUT IF IT'S A DAMPED LYMAN ALPHA SPECTRUM YOU'D MARK DAMPED LYMAN ALPHA BECAUSE IN THE SPECTRUM AND AND A DA IS EQUIVALENT OF SPECTRUM I THINK JUST BECAUSE IT'S GOT A SPECTRAL FEATURE IN THE PHRASE YOU WOULDN'T FOR EXAMPLE WHEN WE WERE SAYING SILICONE TWO LEVELS WE DIDN'T MARK SILICONE TWO THAT'S THAT'S GOT NOTHING TO DO WITH THE SPECTRUM LEVELS THE NEW WORD AND THIS ANSWER IS INCONSISTENT WITH THAT ANSWER YEAH I DON'T THINK THAT'S RIGHT HMM I'M NOT SURE ACTUALLY I TH I THINK I WOULD MARK IT AND MM IT IS A REGION OF THE SPECTRUM AND THEY'RE ACTUALLY USING A REGION OF THE SPECTRUM AS THE DATA UM IF IT'S AN EMISSION LINE DATA M IF IT'S AN EMISSION LINE DATA WOULD WE PUT IT IN I WOULDN'T BUT BECAUSE IT'S A MODIFIER OF DATA IT THE EMISSION LINE IS STRONG THE EMISSION LINE DATA SHOWS STRONG THEN UH I THINK IT'S THE SAME ACTUALLY I TH I THINK IT'S DATA ISN'T EVEN NEEDED IT'S INCONSISTENT WITH THE DAMPED LYMAN ALPHA AT MORE THAN THE NINETY NINE PERCENT OR THE DAMPED LYMAN ALPHA FEATURE IF YOU PUT FEATURE THERE RATHER THAN DATA THEN YOU'D MARK IT BUT I THINK DATA IS EQUIVALENT IF SO FROM THE PERSPECTIVE THE NAMED ENTITY RECOGNITION TASK SO I TH I THINK TH THERE THERE WAS ALSO THIS ONE GUIDELINE OF SAYING FOR EXAMPLE IF SOMETHING UH IS SITTING UNDER A NEGATION RIGHT THE THERE WAS NO UM DAMPED L. Y. ALPHA SOMETHING THEN UM WE THEN I THINK THE CONVENTION WAS THAT WE STILL THAT YOU STILL WOULD MARK THAT RIGHT SO IT'S MORE LIKE UH A S IT'S UH UH IT'S UH SORT OF LIKE A QUITE LITERAL TASK THAT'S REALLY LIKE FINDING THESE KIND OF UH THESE TYPES OF STRINGS UH RATHER THAN REALLY REFERRING TO THE UNDERLYING PHYSICAL REALITY WHICH I MEAN SORT OF LIKE IF IF YOU IF YOU WERE TO RESOLVE THESE KIND OF UH CASES IN ORDER TO PUT THEM SAY IN A DATABASE OR SO THEN YOU'D PROBABLY BE RIGHT IN THIS CASE RIGHT BUT UH TH GIVEN THAT THE KIND OF THING IS THAT THAT THIS NAMED ENTITY RECOGN TASK IS IS A MUCH IS A MUCH MORE UH LITERAL THING