<s>
ELMo	B-General_Concept
(	O
"	O
Embeddings	O
from	O
Language	O
Model	O
"	O
)	O
is	O
a	O
word	B-General_Concept
embedding	I-General_Concept
method	O
for	O
representing	O
a	O
sequence	O
of	O
words	O
as	O
a	O
corresponding	O
sequence	O
of	O
vectors	O
.	O
</s>
<s>
Character-level	O
tokens	O
are	O
taken	O
as	O
the	O
inputs	O
to	O
a	O
bi-directional	O
LSTM	B-Algorithm
which	O
produces	O
word-level	O
embeddings	O
.	O
</s>
<s>
Like	O
BERT	B-General_Concept
(	O
but	O
unlike	O
the	O
word	B-General_Concept
embeddings	I-General_Concept
produced	O
by	O
"	O
Bag	B-General_Concept
of	I-General_Concept
Words	I-General_Concept
"	O
approaches	O
,	O
and	O
earlier	O
vector	O
approaches	O
such	O
as	O
Word2Vec	B-Algorithm
and	O
GloVe	B-General_Concept
)	O
,	O
ELMo	B-General_Concept
embeddings	O
are	O
context-sensitive	O
,	O
producing	O
different	O
representations	O
for	O
words	O
that	O
share	O
the	O
same	O
spelling	O
but	O
have	O
different	O
meanings	O
(	O
homonyms	O
)	O
such	O
as	O
"	O
bank	O
"	O
in	O
"	O
river	O
bank	O
"	O
and	O
"	O
bank	O
balance	O
"	O
.	O
</s>
