code: def __call__(self, f, g):
      (_, T, H), (B, U, H2) = f.shape, g.shape
      f = f.unsqueeze(2).expand(B, T, U, H)
      g = g.unsqueeze(1).expand(B, T, U, H2)
  
      inp = f.cat(g, dim=3)
      t = self.l1(inp).relu()
      t = t.dropout(self.dropout)
      return self.l2(t)
  
imports: from tinygrad.tensor import Tensor
  from tinygrad.jit import TinyJit
  from tinygrad.nn import Linear, Embedding
  from tinygrad.helpers import fetch
  import numpy
  from pathlib import Path
label_desc: Use image node_id 2 for calling the Joint obj's underlying member method code with example usage: obj.__call__(f, g) and returns: self