code: def all_text(self) -> str:
      sentences = []
      for v in self.inputs.values():
          if isinstance(v, list):
              sentences.extend(v)
          else:
              sentences.append(v)
      return "\n".join(sentences)
  
imports: from datetime import datetime
  from typing import Any, ClassVar, Dict, List, Optional, Union
  from argilla.server.commons.models import PredictionStatus, TaskStatus, TaskType
  from argilla.server.constants import DEFAULT_MAX_KEYWORD_LENGTH
  from argilla.server.helpers import flatten_dict
  from argilla.server.pydantic_v1 import BaseModel, Field, root_validator, validator
  from argilla.server.services.datasets import ServiceBaseDataset
  from argilla.server.services.search.model import ServiceBaseRecordsQuery, ServiceScoreRange
  from argilla.server.services.tasks.commons import ServiceBaseAnnotation, ServiceBaseRecord
label_desc: Use image node_id 9 for calling the ServiceTextClassificationRecord obj's underlying member method code with example usage: obj.all_text() and returns: str