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:
"U nás je možné koupit zcela volně například některé toxické látky, ze kterých lze po úpravě získat drogu.
Postion	Tokenization
1	"
2	U
3	nás
4	je
5	možné
6	koupit
7	zcela
8	volně
9	například
10	některé
11	toxické
12	látky
13	,
14	ze
15	kterých
16	lze
17	po
18	úpravě
19	získat
20	drogu
21	.
Position	Tokenization	UPOS	Head	Deprel
1	"	PUNCT	5	punct
2	U	ADP	3	case
3	nás	PRON	5	obl
4	je	AUX	5	cop
5	možné	ADJ	0	root
6	koupit	VERB	5	csubj
7	zcela	ADV	8	advmod
8	volně	ADV	6	advmod
9	například	ADV	12	advmod:emph
10	některé	DET	12	det
11	toxické	ADJ	12	amod
12	látky	NOUN	6	obj
13	,	PUNCT	16	punct
14	ze	ADP	15	case
15	kterých	DET	19	obl:arg
16	lze	VERB	12	acl:relcl
17	po	ADP	18	case
18	úpravě	NOUN	19	obl
19	získat	VERB	16	csubj
20	drogu	NOUN	19	obj
21	.	PUNCT	5	punct