As a helpful and smart assistant, your task is to parse a given text in any language to Universal Dependency (UD) format including POS tags and dependency relations (HEAD and DEPREL).
Key Components of UD Annotation:
1. Tokens: The fundamental units within UD are tokens. These can be individual words, punctuation marks, or even parts of multi-word expressions. Each token has several associated attributes.
2. UPOS Tags: The UPOS field in the CoNLL-U format represents the universal part-of-speech tag assigned to each word. This tag is part of a universal POS tag set designed to be applicable across different languages. The UPOS tags include categories such as NOUN, VERB, ADJ (adjective), ADV (adverb), PRON (pronoun), DET (determiner), and more. 
3. Dependency Relations: Dependency relations are the core of the syntactic representation. They form a tree structure over the tokens in a sentence. Here's how they work:
    - HEAD: This field indicates the head of the current word. The head is the word that the current word is connected to in the dependency parse tree. The value is an integer that corresponds to the ID of the head word within the same sentence. A value of zero (0) indicates that the word is the root of the sentence.
    - DEPREL: The DEPREL field specifies the type of dependency relation between the current word and its head (as specified in the HEAD field). The value is a universal dependency relation or a language-specific subtype of such a relation.
Note: Blank lines are used to mark the boundaries between sentences.
Example:
Let's analyze this sentence with its UD annotation:
"The big dog chased the cat."
1. Tokenization:
- The
- big
- dog
- chased
- the
- cat
- .
2. UPOS Tags:
- The: DET
- big: ADJ
- dog: NOUN
- chased: VERB
- the: DET
- cat: NOUN
- .: PUNCT
3. Head node (parent):
- The: the parent of this word is "dog" at position 3
- big: the parent of this word is "dog" at position 3
- dog: the parent of this word is "chased" at position 4
- chased: this is the root node, therefore its head is 0
- the: the parent of this word is "cat" at position 6
- cat: the parent of this word is "chased" at position 4
- .: the parent of this word is "chased" at position 4
3. Dependency Relations:
- root(ROOT, chased)
- det(dog, The)
- amod(dog, big)
- nsubj(chased, dog)
- det(cat, the)
- obj(chased, cat)
Combining the above annotations, the final output in UD format is:
Position	Tokenization	UPOS	Head	Deprel
1	The	DET	3	det
2	big	ADJ	3	amod
3	dog	NOUN	4	nsubj
4	chased	VERB	0	ROOT
5	the	DET	6	det
6	cat	NOUN	4	obj
7	.	PUNCT	4	punct
Generate UD annotations for the following tokenized text:
They explained that elk in Yellowstone used to browse unmolested on young aspen and willow growing near the banks of streams, a behavior that prevented the saplings from reaching mature stages and increased the possibility of soil erosion.
Postion	Tokenization
1	They
2	explained
3	that
4	elk
5	in
6	Yellowstone
7	used
8	to
9	browse
10	unmolested
11	on
12	young
13	aspen
14	and
15	willow
16	growing
17	near
18	the
19	banks
20	of
21	streams
22	,
23	a
24	behavior
25	that
26	prevented
27	the
28	saplings
29	from
30	reaching
31	mature
32	stages
33	and
34	increased
35	the
36	possibility
37	of
38	soil
39	erosion
40	.
Position	Tokenization	UPOS	Head	Deprel
1	They	PRON	2	nsubj
2	explained	VERB	0	root
3	that	SCONJ	7	mark
4	elk	NOUN	7	nsubj
5	in	ADP	6	case
6	Yellowstone	PROPN	4	nmod
7	used	VERB	2	ccomp
8	to	PART	9	mark
9	browse	VERB	7	xcomp
10	unmolested	ADJ	9	xcomp
11	on	ADP	13	case
12	young	ADJ	13	amod
13	aspen	NOUN	9	obl
14	and	CCONJ	15	cc
15	willow	NOUN	13	conj
16	growing	VERB	13	acl
17	near	ADP	19	case
18	the	DET	19	det
19	banks	NOUN	16	obl
20	of	ADP	21	case
21	streams	NOUN	19	nmod
22	,	PUNCT	9	punct
23	a	DET	24	det
24	behavior	NOUN	9	appos
25	that	PRON	26	nsubj
26	prevented	VERB	24	acl:relcl
27	the	DET	28	det
28	saplings	NOUN	26	obj
29	from	SCONJ	30	mark
30	reaching	VERB	26	advcl
31	mature	ADJ	32	amod
32	stages	NOUN	30	obj
33	and	CCONJ	34	cc
34	increased	VERB	26	conj
35	the	DET	36	det
36	possibility	NOUN	34	obj
37	of	ADP	39	case
38	soil	NOUN	39	compound
39	erosion	NOUN	36	nmod
40	.	PUNCT	2	punct