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:
En su opinión, la situación global de precariedad de los jóvenes apenas ha variado en los últimos cuatro años, en los que el único cambio que se ha producido afecta a la estructura del colectivo, pero no a su peso relativo en comparación con la población activa.
Postion	Tokenization
1	En
2	su
3	opinión
4	,
5	la
6	situación
7	global
8	de
9	precariedad
10	de
11	los
12	jóvenes
13	apenas
14	ha
15	variado
16	en
17	los
18	últimos
19	cuatro
20	años
21	,
22	en
23	los
24	que
25	el
26	único
27	cambio
28	que
29	se
30	ha
31	producido
32	afecta
33	a
34	la
35	estructura
36	del
37	colectivo
38	,
39	pero
40	no
41	a
42	su
43	peso
44	relativo
45	en
46	comparación
47	con
48	la
49	población
50	activa
51	.
Position	Tokenization	UPOS	Head	Deprel
1	En	ADP	3	case
2	su	DET	3	det
3	opinión	NOUN	15	obl
4	,	PUNCT	3	punct
5	la	DET	6	det
6	situación	NOUN	15	nsubj
7	global	ADJ	6	amod
8	de	ADP	9	case
9	precariedad	NOUN	6	nmod
10	de	ADP	12	case
11	los	DET	12	det
12	jóvenes	NOUN	6	nmod
13	apenas	ADV	15	advmod
14	ha	AUX	15	aux
15	variado	VERB	0	root
16	en	ADP	20	case
17	los	DET	20	det
18	últimos	ADJ	17	amod
19	cuatro	NUM	17	nummod
20	años	NOUN	15	obl
21	,	PUNCT	32	punct
22	en	ADP	24	case
23	los	DET	24	det
24	que	PRON	32	obl
25	el	DET	27	det
26	único	ADJ	27	amod
27	cambio	NOUN	32	nsubj
28	que	PRON	31	nsubj
29	se	PRON	31	expl:pv
30	ha	AUX	31	aux
31	producido	VERB	27	acl
32	afecta	VERB	20	acl
33	a	ADP	35	case
34	la	DET	35	det
35	estructura	NOUN	32	obj
36	del	ADP	37	case
37	colectivo	NOUN	35	nmod
38	,	PUNCT	40	punct
39	pero	CCONJ	40	cc
40	no	ADV	32	conj
41	a	ADP	40	case
42	su	DET	43	det
43	peso	NOUN	40	nmod
44	relativo	ADJ	43	amod
45	en	ADP	46	case
46	comparación	NOUN	43	nmod
47	con	ADP	49	case
48	la	DET	49	det
49	población	NOUN	46	nmod
50	activa	ADJ	49	amod
51	.	PUNCT	15	punct