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:
Como se ha visto en el apartado anterior, los polímeros orgánicos dopados presentan serias dificultades a causa fundamentalmente de su baja estabilidad térmica y química, lo que por el momento limita sus aplicaciones prácticas.
Postion	Tokenization
1	Como
2	se
3	ha
4	visto
5	en
6	el
7	apartado
8	anterior
9	,
10	los
11	polímeros
12	orgánicos
13	dopados
14	presentan
15	serias
16	dificultades
17	a
18	causa
19	fundamentalmente
20	de
21	su
22	baja
23	estabilidad
24	térmica
25	y
26	química
27	,
28	lo
29	que
30	por
31	el
32	momento
33	limita
34	sus
35	aplicaciones
36	prácticas
37	.
Position	Tokenization	UPOS	Head	Deprel
1	Como	SCONJ	4	mark
2	se	PRON	4	expl:impers
3	ha	AUX	4	aux
4	visto	VERB	14	advcl
5	en	ADP	7	case
6	el	DET	7	det
7	apartado	NOUN	4	obl
8	anterior	ADJ	7	amod
9	,	PUNCT	4	punct
10	los	DET	11	det
11	polímeros	NOUN	14	nsubj
12	orgánicos	ADJ	11	amod
13	dopados	ADJ	11	amod
14	presentan	VERB	0	root
15	serias	ADJ	16	amod
16	dificultades	NOUN	14	obj
17	a	ADP	18	case
18	causa	NOUN	14	obl
19	fundamentalmente	ADV	18	advmod
20	de	ADP	23	case
21	su	DET	23	det
22	baja	ADJ	23	amod
23	estabilidad	NOUN	18	nmod
24	térmica	ADJ	23	amod
25	y	CCONJ	26	cc
26	química	ADJ	24	conj
27	,	PUNCT	33	punct
28	lo	PRON	33	det
29	que	PRON	33	nsubj
30	por	ADP	32	case
31	el	DET	32	det
32	momento	NOUN	33	obl
33	limita	VERB	14	advcl
34	sus	DET	35	det
35	aplicaciones	NOUN	33	obj
36	prácticas	ADJ	35	amod
37	.	PUNCT	14	punct